What type (weight) of oil to use?

[Firebird Phoenix]

What type (weight) of oil should I use on my 1995 Firebird 3.4 V6 5-Speed? It has 157,6XX. I've been running Royal Purple 10w30 since 141,741 miles (yes i've changed it since then) but just wondering what weight to use due to engine age? Thank you

[Kup98ss]

10w30 is fine.
10w40 should be ok, but I would stick with the 30.

[doozjamann]

I run 5w30

This is my 3rd f-body and I've always ran 5w30, never had a problem.

[Weston_24]

Try a search on this topic...you will find a lot

[Firebird Phoenix]

I bought the 10w30 but noticed when I got home that I accidentally bought "SAE 10w30"??? What is SAE and will I need to return these bottles for just "10w30" or will these be fine?

[Sarge]

Society of Automotive Engineers
10-30 is what you wanted in the first place. Less shearing due less viscosity enhancers.

[Firebird Phoenix]

Society of Automotive Engineers
10-30 is what you wanted in the first place. Less shearing due less viscosity enhancers.

Thanks Sarge, so theres not a difference between Royal Purple 10w30 and Royal Purple SAE 10w30?? Just the one is recognized or whatever by the SAE??? Thanks for the response.

[Sarge]

Are you talking about the Racing 21 and 10-30?

[Firebird Phoenix]

Are you talking about the Racing 21 and 10-30?

Idk... It just says "SAE 10w30" on the Royal Purple Bottle and the old kind I used just said "10w30" on the bottle.

[Sarge]

SAE means it probably carries the SAE SM Rating.....