Originally Posted By: gfh77665
Originally Posted By: Johnny
Yes I have. It's a pretty good read and most advise is sound.
Tell me just one thing: In general, does it OK the use of 5w20 in the summer heat? Or does it prefer the relative thickness of 5w-30?
I would really like to know that!
Here is what my copy says about 5w20 in one place:
Quote:
Note, a 5w20 viscosity compared to 10w4 and 15w50 can translate to fuel savings ranging as high as 5 percent, depending on additives and drivingconditions. However, beware that such a viscosity selection may retard engine life (see Chapter 7, which discusses this issue in more detail).
Mine was published in 2003 and sports the cover showing a guy pulling a drain plug with used oil running all over his hand. Anyway, the book did not get me to consider using 5w20, if anything, it got me farther away from it. As I said, I moved from 5w30 to 10w30 High Mileage oil based on what I got out of this book, and I am still using 10w30 HM today.
OBTW, I'm pretty sure there is an old thread about this book somewhere on this site, probably 4 or 5 years ago I would guess, maybe even started by me.