Bimmerfest - BMW Forums - View Single Post - Engine Warm-up time
View Single Post
Old 10-20-2008, 07:54 AM
franka franka is offline
Officially Welcomed to the 'Fest
Location: Lakewood
Join Date: Jan 2006
Posts: 8,776
Mein Auto: E39 540i Sport
Originally Posted by 335i Driver View Post
1. Your statement that all synthetic oils are hydrocarbons is absolutely false. Many of the best synthetics are esters, diesters and polyesters, therefore they have oxygen atoms in the molecular chain, thus by definition they cannot be hydrocarbons.

2. The study you posted is about gear lubrication at high temps, not even a valid comparison to engine lubrication at low temps. Note the lowest temp tested was 50C or 122F. While I agree that there may be times that a mineral oil may be better than a synthetic the question is much more complex than that. There are many variables including the type of synthetic.

However, why don't you ask your engine if it is starting at 20 below zero if it would prefer a solid mineral oil frozen at the bottom of the crankcase performing no lubrication at all or a synthetic that is liquid and is actually being pumped throughout the engine and to the top of the cams. My friends that is where 80% of the wear on an engine takes place and where mineral oils fail severely compared to a good synthetic.
+1 very good. I have been pushing about needing a bit of time for the oil to get to the farthest points, the cams.

540, Dirrezas (4) @ 275/35-18 ea, Eibach springs & bars, Bilstein Sports, Dinan Stage 2, slotted ATEs, Hi-Temp HTP pads, SS Lines, UUC-SS, White/Tan, Bling-free & Stealthy
Reply With Quote