dino oil vs synthetic mpg
has any one when from dino oil to full synthetic oil & had better m p g & what oil & how much better m p g did you get ? i have 2011 chevy 2500 Duramax pulling 35 ft 5th wheel..
Forum Discussion
ktmrfs wrote:FishOnOne wrote:ktmrfs wrote:
mfg are slowly switching to synthetics to get the best mileage possible for EPA testing, along with the 0W oils. Now, the EPA test is a short time from a cold start. and they are worried about 0.1mpg differences.
So.... do synthetics improve mileage, yes, but not likely enough that you can tell, and the biggest effect is likely in short trips in cold climates. long trips, less so.
synthetic advantage is more in engine protection and cold temp starting not mpg improvements. and given todays engine longevity, not sure there is a payback. your choice.
Back in the 1960's living in the midwest and not having access to a garage or a way to plug in the block heater when in college, I used conoco DN600 polar start oil in the winter. not sure if it was a synthetic or not, but at -40F my car, and others that used it would crank much faster and usually start better than others running 10W-30 at the same temps.
Manufacturers are switching to lower viscosity to improve fuel mileage.
agreed, that is one thing I pointed out. but they are looking for 0.1mpg improvements. how many of us could even measure that level of change? or have the cost/benefit pay off.
But when you can achieve a .1mpg increase across your entire population of vehicles you sell for the year that's pretty significant or when you own a fleet of trucks that's constantly being utilized it adds up just by simply decreasing the oil viscosity. I shouldn't say "simply" because the engines have to be machined to even tighter tolerances to be really compatible with thinner oils.
For you and myself it's insignificant.
