It doesn't matter. You're still getting the protection of 30 weight oil
at normal summer temperatures, within the design life of the oil. For
more than you probably want to know about motor oil ratings, see:
<URL:http://www.advanceautoparts.com/english/youcan/html/ccr/ccr20040601ov.html>

And $19 is a good price. I last paid $30 at the local qwik lube.
But they put in enough to bring it up to the "full" mark on the
dipstick, too.

Here's one, though: The guy at the lube shop claimed that the red dye
in ATF fluid is designed to give up and turn brown about the same time
as the additives in the fluid give up. Anyone know if that's true?


DougW wrote:
> This is what I get for dropping my Jeep off at a Dodge dealership for
> a quick/cheap oil change. Oh well, worst off I run for a while,
> flush, and refill. Only $19 for a full oil flush isn't bad.
>
> By the receipt it looks like they put 5 quarts of 5W30 in.
> ...er..
> Should be 6 quarts of 10W30.
>
> I gotta start paying more attention....
>
> Oil looks nice and clean but 5W is more for < freezing expected
> in the next interval. It's close to fall, but not that close to
> winter. On the other hand the oil is only 10 cold with a viscosity
> of 30 at operating temperature. i.e. more for easier starts in cold
> weather.
>
> I'll top off the oil with some 10W30 synthetic so that's not a biggie.
>
> Still though, I've got a few more thousand miles of travel in 90+ weather.
> From what I understand there really isn't an issue since the weight is still
> 30 and the engine operates at the same temperature anyway.
>
> Thoughts?
>