Camaro_94

iTrader: (5)

I want to start running 10w40 oil in my Camaro. I have been using full synthetic mobil 1 5w30....

I've had good luck with Mobil in the past, and they only offer 10w40 oil on their High Milage oil. My SS has 45K miles on it. Its not recommended to be used until 75K miles.

With that being said... Should I look to go elsewhere with my selection?? I know Amsoil makes a fully synthetic 10w40 oil, but I dont think I'll have easy & cheap access to it.

What are my options here for using 10w40?

RPM WS6

iTrader: (3)

Why??

KENS_SS_4

Your owners manual clearly states 5-30 is best for your engine. Thats what I use.

Why would you use something else?

Did you build the engine?

ParkerSS

iTrader: (2)

Valoline VR1. I think they have a 10-40 but I'm not sure. I've ran 20-50 VR1 in my SS before with no problems. The owners manual calls for lower weights in order to help with passing emmissions.

ICRAZY6

iTrader: (68)

I run mobile 1 but got in on a deal with Amsoil 0w-30 Signature Series 100% synthetic. So it's only one oil change a year or 35,000 miles. I'm going to change it out tonight after I was the car.

RPM WS6

iTrader: (3)

I use VR-1 in my Nova, because it contains high levels of zinc for old, flat tappet cams. As far as I know, the only multi-weight versions of VR-1 are 10w30 and 20w50. All the rest are straight weight (30w, 40w, 50w, 60w).

The only 40 weight that I'd recommend for a stock LS1 would be Mobil 1 0w40 (or 5w40), since their 40 weights are on the thin side of the spectrum and very close to a thick 30 weight (which is what LS1s seem to like best).

01ssreda4

iTrader: (96)

exactly......never understood the reinvention of the wheel.

Camaro_94

iTrader: (5)

My oil pressure is a little on the low side. Its about 27psi after its warmed up.

I'm putting a new oil pump in soon... And this would just be a temp fix for the problem until I have enough time for the install.

I fugured a 10w40 oil would give me a little more oil pressure and bump it back closer to where it should be while the problem still exists.

After I fix the problem, I will be back to Mobil1 full synthetic 5w30

RPM WS6

iTrader: (3)

27psi at idle isn't harmful at all. I think people worry too much about idle oil pressure. If it's at least above 20 under all idle conditions I wouldn't worry about it (unless there's been a recent change from what's "normal" with your engine and/or gage). The factory gage isn't 100% accurate, so pretty much anything from 20-40 at idle can be "normal" from one car to the next.

Going to a thicker oil is not a "fix" though. If (and I'm not saying it is, but just for the sake of arguement) your oil pump is failing, using a thicker oil isn't going to help the issue.

Using a heavier weight oil only increases pressure because flow is restricted due to the thicker oil. It doesn't mean that the pump is actually pumping it any better.

Mr Incredible

Yeah, what he said...

elias_799

iTrader: (8)

15w40 royal purple on my turbo 347