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Old 05-22-2018, 04:46 PM
AllenHasFastE92 AllenHasFastE92 is offline
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I mixed 0W 40 Oil with 0W 20 HELP

I accidentally bought castrol edge 0w 20 as the second bottle, so i filled up 5 quarts of 0w 40 and 2 quarts of 0w 20, is it bad ? and should i get it redone ? Please respond as this is concerning me for my vehicles health.
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Old 05-22-2018, 05:07 PM
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So your car has 0W-34 now. This is still in spec, so no need to replace it.
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Old 05-22-2018, 05:13 PM
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Relax you can mix all you like. People are so sensitive about engine oil when you can pretty much run whatever you want. Ive mixed so much in this car its not even funny and never had a single issue 160,000 miles and going strong
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Old 05-22-2018, 05:25 PM
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Quote:
Originally Posted by AllenHasFastE92 View Post
I accidentally bought castrol edge 0w 20 as the second bottle, so i filled up 5 quarts of 0w 40 and 2 quarts of 0w 20, is it bad ? and should i get it redone ? Please respond as this is concerning me for my vehicles health.

Well, let's see....both LL-01 approved?

If so relax! Cook up a delicious dinner & enjoy a beer. You're OK....


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Old 05-22-2018, 05:28 PM
AllenHasFastE92 AllenHasFastE92 is offline
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Relax you can mix all you like. People are so sensitive about engine oil when you can pretty much run whatever you want. Ive mixed so much in this car its not even funny and never had a single issue 160,000 miles and going strong
How are your turbos ? I'am worried about those, i do beat on it from time to time when i see the chargers and mustangs on the highway, but else whys normal driving. And is there any problem with delaying my oil filter housing gasket leak repair ?
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Old 05-22-2018, 05:30 PM
AllenHasFastE92 AllenHasFastE92 is offline
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Well, let's see....both LL-01 approved?

If so relax! Cook up a delicious dinner & enjoy a beer. You're OK....


I'am not totally sure i used castrol edge full synthetic.
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Old 05-22-2018, 05:33 PM
AllenHasFastE92 AllenHasFastE92 is offline
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So your car has 0W-34 now. This is still in spec, so no need to replace it.
Okay, i was worried, any flaws with running this ? should i not beat on it as hard ? i live in Michigan so weather fluctuates all the time.
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Old 05-22-2018, 05:39 PM
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You mixed an approved oil with an approved oil,
Acoste already calculated your oil grade, still within specs.

It shouldn’t be any issues!
If you have money to waste, go get it drained and refilled.




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Old 05-22-2018, 05:41 PM
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...is there any problem with delaying my oil filter housing gasket leak repair ?


Go get that one fixed asap!


Oil dripping on alternator/serpentine belt! No good!


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Old 05-22-2018, 05:42 PM
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Originally Posted by AllenHasFastE92 View Post
Okay, i was worried, any flaws with running this ? should i not beat on it as hard ? i live in Michigan so weather fluctuates all the time.
If you want to be very analytical, with this oil (once the engine is fully warmed up) you will have slightly higher oil pressure compared to 0W-40.
However genuine BMW oil is 0W-30 so that slightly higher oil pressure is a bit less than with a genuine BMW oil.

But the oil flow is greater with thinner oil.
0W-40: lower oil pressure but faster stream.
0W-30: higher oil pressure but slower stream.
Somehow you can calculate the oil flow / sec based on these. The difference will be marginal.

Just make sure the oils were good quality. Has to be full synthetic.
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Last edited by acoste; 05-22-2018 at 05:47 PM.
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Old 05-22-2018, 05:50 PM
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Read this if you want more details:

https://www.ferrarichat.com/forum/th...e-this.136052/
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Old 05-22-2018, 05:56 PM
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Originally Posted by AllenHasFastE92 View Post
I'am not totally sure i used castrol edge full synthetic.
Not all Castrol synthetic is BMW approved. Check the bottles. The front will say European Car, or something like that, and in the specs it will say it meets the LL spec.

Check the Castrol site. then use their oil selector. It will tell you the product number of the LL approved oils.
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Old 05-22-2018, 05:58 PM
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Originally Posted by AlphaBetaX5 View Post
Go get that one fixed asap!


Oil dripping on alternator/serpentine belt! No good!

Y'know OP, the Grape Guy is spot-on.

[click here] for what can and does happen when an oily belt slips off....outch!
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Old 05-22-2018, 07:23 PM
AllenHasFastE92 AllenHasFastE92 is offline
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Thanks for the help everyone, i mean the oil filter housing does not leak that bad, but my car usually drips oil on the drive way if parked forward, so i have to reverse it to into my driveway so it does not drip.
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Old 05-22-2018, 08:38 PM
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Dripping oil on the driveway does not fit the definition of "not that bad." A minor/slow leak will only wet the block and possibly the inside of the engine-bay shield. It will look a mess but not drip.

You don't want to postpone fixing this particular leak on this engine. An oiled serpentine belt can creep off the belt tensioner, wrap around the crank pulley, shred, and get ingested by the engine past the front main seal. Then maybe you get to buy a new engine.
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Old 05-23-2018, 12:26 AM
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Originally Posted by acoste View Post
So your car has 0W-34 now. This is still in spec, so no need to replace it.
Not necessarily a 0W-34...
I know a lot of old school guys like to mix motor oil to get a "specific cst" to supposedly get the "perfect oil".
However this does not work because mixing oil is not as easy as you think.
You would think that mixing one quart of 0W-20 with a quart of 0W-40 would end up being a 0W-30.
However, there were multiple tests and studies done on this to prove it is not that simple.
Tests showed that if you were to mix 2 oils, the oil would end up anywhere in that range but it cannot be calculated with simple addition and division.
For example, if you were to mix 1 quart of 0W-20 with 1 quart of 0W-40 the oil would end up being somewhere between a 0W-20 and a 0W-40 but not necessarily a 0W-30 even though it is a 1:1.
This is because different viscosity oils are made with different viscosity improvers and the chemistry of the oils may be different.

Even though OP "should" be fine since a 5:2 ratio means the odds are on his side, I would still change the oil soon to be on the safe side if it was my car.
Just my take on it.
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Old 05-23-2018, 05:40 AM
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Originally Posted by Zeichen311 View Post
Dripping oil on the driveway does not fit the definition of "not that bad." A minor/slow leak will only wet the block and possibly the inside of the engine-bay shield. It will look a mess but not drip.

You don't want to postpone fixing this particular leak on this engine. An oiled serpentine belt can creep off the belt tensioner, wrap around the crank pulley, shred, and get ingested by the engine past the front main seal. Then maybe you get to buy a new engine.
Agreed. Being a military veteran and having done maintenance on multiple types of vehicles in my 20 years, one thing I can say unequivocally is, when a leak forms drops and they fall to the ground the vehicle is deadlined and shouldn't be moved until repaired. Now, if the military takes a leak that serious then you should probably take yours seriously too. Am I suggesting that you park it and not use it at all? No. But take care of it soon? Absolutely.
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Old 05-23-2018, 06:05 AM
AllenHasFastE92 AllenHasFastE92 is offline
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Originally Posted by Zeichen311 View Post
Dripping oil on the driveway does not fit the definition of "not that bad." A minor/slow leak will only wet the block and possibly the inside of the engine-bay shield. It will look a mess but not drip.

You don't want to postpone fixing this particular leak on this engine. An oiled serpentine belt can creep off the belt tensioner, wrap around the crank pulley, shred, and get ingested by the engine past the front main seal. Then maybe you get to buy a new engine.
Agreed. Being a military veteran and having done maintenance on multiple types of vehicles in my 20 years, one thing I can say unequivocally is, when a leak forms drops and they fall to the ground the vehicle is deadlined and shouldn't be moved until repaired. Now, if the military takes a leak that serious then you should probably take yours seriously too. Am I suggesting that you park it and not use it at all? No. But take care of it soon? Absolutely.
Do you think it would be able to hold 1000 ot even 2 miles, because as of now i have to get money from my parents to fix it. Because i dony have a job at the moment and i dont want to take that route, a high school student without a job so.
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Old 05-23-2018, 06:25 AM
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Originally Posted by AllenHasFastE92 View Post
Do you think it would be able to hold 1000 ot even 2 miles, because as of now i have to get money from my parents to fix it. Because i dony have a job at the moment and i dont want to take that route, a high school student without a job so.
Every case is different. None of us can predict the future nor could we make an intelligent guess without seeing your engine. Dripping oil is a bad sign but the exact location of the source can make all the difference in how much time you have.

Check the belt, tensioner, pulleys, and surrounding areas every day--ideally, before every drive (keep a strong flashlight in the car). If you see the leak spreading close to these parts, fix the car ASAP. If you ever see a sheen of oil on the belt or pulleys, park it immediately until fixed.
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Last edited by Zeichen311; 05-23-2018 at 06:31 AM.
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Old 05-23-2018, 08:37 AM
AllenHasFastE92 AllenHasFastE92 is offline
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Quote:
Originally Posted by AllenHasFastE92 View Post
Do you think it would be able to hold 1000 ot even 2 miles, because as of now i have to get money from my parents to fix it. Because i dony have a job at the moment and i dont want to take that route, a high school student without a job so.
Every case is different. None of us can predict the future nor could we make an intelligent guess without seeing your engine. Dripping oil is a bad sign but the exact location of the source can make all the difference in how much time you have.

Check the belt, tensioner, pulleys, and surrounding areas every day--ideally, before every drive (keep a strong flashlight in the car). If you see the leak spreading close to these parts, fix the car ASAP. If you ever see a sheen of oil on the belt or pulleys, park it immediately until fixed.
Thank you for the info, for all i know my engine block is covered with oil.
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Old 05-23-2018, 12:11 PM
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Originally Posted by AllenHasFastE92 View Post
Thank you for the info, for all i know my engine block is covered with oil.
Happy to help.

When you do get it repaired, don't forget to ask the technician to thoroughly clean the engine of waste oil, including any and all oil-covered parts they can reach. A few minutes and a can or two of Brakleen (or similar parts cleaner) is all it takes, but few shops will bother unless asked. It is 100x easier to spot the next leak--and ensure the current one was fixed properly --on a clean engine.
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Old 05-23-2018, 12:27 PM
AllenHasFastE92 AllenHasFastE92 is offline
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Originally Posted by AllenHasFastE92 View Post
Thank you for the info, for all i know my engine block is covered with oil.
Happy to help.

When you do get it repaired, don't forget to ask the technician to thoroughly clean the engine of waste oil, including any and all oil-covered parts they can reach. A few minutes and a can or two of Brakleen (or similar parts cleaner) is all it takes, but few shops will bother unless asked. It is 100x easier to spot the next leak--and ensure the current one was fixed properly --on a clean engine.
will do brother thank you.
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Old 05-23-2018, 08:18 PM
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CALWATERBOY TRE CALWATERBOY TRE is offline
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Originally Posted by rdkind62 View Post
Agreed. Being a military veteran and having done maintenance on multiple types of vehicles in my 20 years, one thing I can say unequivocally is, when a leak forms drops and they fall to the ground the vehicle is deadlined and shouldn't be moved until repaired. Now, if the military takes a leak that serious then you should probably take yours seriously too. Am I suggesting that you park it and not use it at all? No. But take care of it soon? Absolutely.

Dude! Legions of British motorcycle pilots disagree.

.

Last edited by CALWATERBOY TRE; 05-23-2018 at 08:20 PM.
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Old 05-27-2018, 11:36 AM
Davein Davein is offline
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Dude! Legions of British motorcycle pilots disagree.

.
And Harley riders.
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