Synthetic oil MPG boost since change

[blacksan]

Originally Posted by swng

That is a really good result, if you are not a hypermiler, I mean, if you just drive like an ordinary driver or an F.E. conscious driver at most. I guess you may be a not-so-serious hypermiler. Anyway getting 47 miles per US gallon without losing the comfort of the AC is no small deal. I am sure just the use of synthetic oil cannot have given you such a good result. I have to assume that you have not driven much in busy city traffic. I am very interested in knowing more about how to get good fuel economy without sacrificing comfort, convenience and safety and I sincerely invite you to share your skills and experience at the Fuel Economy thread.

I use synthetic in both engine and tranny. I short shift at low RPM and keep a real steady throttle at speed. When I changed the tranny fluid to synthetic I noticed how much smoother the synthetic was as I lost a discernible degree of engine breaking with the tranny. On my previous car (Subaru) I still had 75% brake pad material after 80K which is a result of my interstate commute and engine breaking with tranny. Does this help?

BTW, I change my filter at 5K and top off with a full fluid change at 20K with Amsoil synthetic in both motor and tranny.