5w30 or 10w30 for 5.3?

[chane]

Are you guys running 5w30 or 10w30 in your 5.3's?  I am getting ready to change the oil and wonder what I should be getting.  I live in the West Texas heat and have been using Mobil1 10w30 every 3k w/the PF 59 filter.  Is the 10w30 too thick?

Thanks!

[y2kz71]

10w-30 is probably ok, but I use 5w-30 just so the dealer could'nt give me trouble in times of warranty issues.

[Roofer]

I use 10W30 Mobil 1 and a AC PF59 filter in the summer. I switch to 5W30 in the winter, hoping that the thinner oil will help with cold starts. If the dealer ever asks, just say 5W30. My dealer told me that he would never use 5W30 non-synthetic in any V8. Not sure why that would make a difference, but that is what he said.

[MountaineerTom]

I use 5w-30 Valvoline and AC PF-59 filter in my truck.  But I agree, 10w-30 won't give you a problem.  It's in the ownwers manual.

[The Beav]

5W-30 Mobil1 for my power plant.

[NewbieZ71]

5W-30 because thats what the manual says and I dont need a warranty problem down the road..

[jeggers]

Chane,

           Sorry to get off the subject, but those pics of your truck kick a--!!!!!!!!!!!

                                                    

[chane]

Thanks jeggers!

You guys need to go back out and read your manual.  It says 5w30 preffered and 10w30 in hot climate.  I don't think it would effect your warranty.

[LokiSLE]

I always use 5w30...what am i talking about...I am coming up on my truck's only second oil change ever....rub rub rub...

[LT]

chane, i know that I live in a different climate than you do in Texas but we can get hot for a period of time. I use 5/30 Mobil I year around. i also use Mobil I filters. There a a few studies of filters out on the web that show a few filters superior to others. I can't remember the address' or I'd copy them here. With the heat in Texas right now, I'd doubt that 5/30 or 10/30 make much difference to engine performance or future performance. So, flip a coin, chose one or the other and forget about it.

(Edited by LT at 9:02 pm on Aug. 6, 2001)

[RyanbabZ71]

5W-30 Mobil 1  and PF59 AC oil filter ( i have about a dozen i found em at walmart on special for 50 cents each)

I live in indiana

summers 90's to 100's

winter -50 (windchill) to 20 above

 

[illmac77]

I use 10w30 royal purple its good up to 6,000 miles

ill change it when the light comes on around 4500

[burgundyz71]

Never a problem with my 97 350 using Valvoline 10-30 so my 99 also gets Valvoline 10-30. Always use AC Filters

[DigUout]

Been using 5W-30 year round since the July 3rd Blizzard of '95-

[76BBSub]

Chane is right...if you look at the manual it says 5W-30 for normal use, 10W-30 in hotter climates.  I think I usually ran 5W-30.

The thing with multi-viscosity oils is that once they heat up they have the characteristics of the second number, so both oils should lubricate the same once up to operating temperature, like a straight 30 weight at normal operating temp.

Jeff