My research on the values of syn oil tells me that it benefits the engine...
Particularly with reference to better gas mileage.
Because it lasts longer ,ie. I can travel twice as far between oil changes.
I drive about 40 miles per day highway and 10 miles per day city .
Twice a month I do 80...
I have a 1998 Volvo S70 with 202,400 miles on it.
My mechanic tells me that because of the
High miles ,I should not switch to a
synthetic oil .
True or False ?
Thanks