To keep it real and subjective.
I like to deal in real data. Not accept something I hear on forums unless I do the testing myself.
For us to talk about specifications and real world experience we'd both have to have two of the same
vehicles and compare notes. So far no one here has what I have and in that case we have no experts on this subject.
Could it be frictional losses from C Mag? Yes it could be- that needs to be ruled out. I have heard others suggest this
about the oil from their observations on unrelated issues- shop talk. However I just don't know- never studied it.
It repeats and on both cars. If the 0w20 C Mag dials back the mileage we have the culprit.
When the Total 0w20 went into both cars they seemed to rev like sports cars. That was the very first thing I noticed.
Both cars also have the same tires and rims and use the same TT fuel and the other car is just 300 yards away.
I am also a heavy user of all grades of C Mag. But in these cars I wont go back to it- but down the road I will experiment with the C Mag 0w20.
It would be nice if others who own these would chime in.
Originally Posted By: Yup
https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-advanced-fuel-economy
That's why I think you're imagining things. 0.2-2.3%. So in a car getting 40mpgs on the highway...0.08 to 0.92 mpg improvement. Given real life, barely noticeable. If you drive 12k per year, at best you'll save $1.50 per month at $2.50 per gallon...I'd recommend putting that savings in an aggressive mutual fund so you can buy a steak dinner with it when you retire.
