Hi Folks
For 1.5 years, I have been trying to solve what I perceive to be a low MPG issue (see below). I drive a well maintained, 110k miled, 1998 528i Auto with a 2/98 build date.
I am trying to decide if an MAF and or Vanos replacement would now be a worthwhile investment in addition to all the expense I have already incurred. Unfortunately, I cannot use the Hyundai Sonata MAF part because I have the early 528i.
I have done all known maintenance items and mpg improvement methods discussed on the board except clean or replace the MAF and Vanos. I have no notable problems with MAF or Vanos and all engine codes are clear.
I think, however, that my mileage should be better, though I fear that the testaments to higher MPG after MAF and Vanos replacement may be, largely, a placebo effect, especially for the older single Vanos 528's.
Certainly, the statements are estimates of improvements and not done under 'apples to apples' comparisons. Does anyone have access to any good objective (more scientific)before and after MAF replacement data?
With automatic and A/C and not heavy footed driving in Orlando on flat roads I get the following mileage.
1) 14.7 mpg for the 3 mile commute downtown, traffic lights, traffic and stop signs, car not warmed up.
2) 17 - 18 MPG driving around town when not having to stop every mile for a traffic or stop light.
3) 27 MPG all highway, limited traffic with A/C and cruise control engaged.
I think all of the above should be 2-3 mpg higher. But, am hesitant to sond the money for MAF and VAnos without better confidence in improved performance. Nothing has worked so far!
Thoughts anyone?
Thanks in advance!
For 1.5 years, I have been trying to solve what I perceive to be a low MPG issue (see below). I drive a well maintained, 110k miled, 1998 528i Auto with a 2/98 build date.
I am trying to decide if an MAF and or Vanos replacement would now be a worthwhile investment in addition to all the expense I have already incurred. Unfortunately, I cannot use the Hyundai Sonata MAF part because I have the early 528i.
I have done all known maintenance items and mpg improvement methods discussed on the board except clean or replace the MAF and Vanos. I have no notable problems with MAF or Vanos and all engine codes are clear.
I think, however, that my mileage should be better, though I fear that the testaments to higher MPG after MAF and Vanos replacement may be, largely, a placebo effect, especially for the older single Vanos 528's.
Certainly, the statements are estimates of improvements and not done under 'apples to apples' comparisons. Does anyone have access to any good objective (more scientific)before and after MAF replacement data?
With automatic and A/C and not heavy footed driving in Orlando on flat roads I get the following mileage.
1) 14.7 mpg for the 3 mile commute downtown, traffic lights, traffic and stop signs, car not warmed up.
2) 17 - 18 MPG driving around town when not having to stop every mile for a traffic or stop light.
3) 27 MPG all highway, limited traffic with A/C and cruise control engaged.
I think all of the above should be 2-3 mpg higher. But, am hesitant to sond the money for MAF and VAnos without better confidence in improved performance. Nothing has worked so far!
Thoughts anyone?
Thanks in advance!