Originally Posted By: OVERKILL
Originally Posted By: jk_636
Im not going to argue this point any longer. There is a plethora of research out there that proves that many, many people have increased their MPG when switching from dino to full synthetic oils. Perhaps you should do some research. Just because it didn't happen for you does not make it impossible.
See, that "research" is very subjective and claimed by people with an agenda usually. That agenda of course being that they are observing some sort of measurable benefit from the change. Going from 5w-30 conventional to 5w-30 synthetic isn't going to net anybody a 3Mpg gain. If it did, as I said, the OEM's would be all over it, as it is WAY cheaper than re-engineering an engine to run a grade thinner, which is the current approach.
That's not to say somebody won't pick up a fraction of a MPG or something, that's believable. A high VI synthetic, on a car that is short tripped I'm sure will have some form of small measurable increase in fuel economy. But 3Mpg is not a small increase and is the number I am contesting here.
If Royal Purple could claim that they net the average conventional user a 3Mpg gain in fuel economy with a switch to one of their synthetic offerings in the same grade you'd bet they'd be all over that too
Any oil maker would be. Instead, the claims are vague, like with Mobil one's "AFE" lineup, because the gains primarily occur during warm-up and really aren't that much.
This thread has nothing to do with oil weights. Why you keep bringing this up, I have no idea.
You cant believe that I gained considerable MPG on the highway when I switched to a high grade, full synthetic oil.
I cant believe you are on BITOG saying that Synthetic oils wont/dont/cant increase your gas mileage as compared to conventional oils.
I will let the rest of the members here decide which statement has more merit.