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Apr 26, 2008 | 02:05 PM

mustangballer20

Thread Starter

3rd Gear Member

Joined: Apr 2007

Posts: 725

From:

quick question

do you have to run 5w-20 in a 93 tuned engine or can you run 5w-30...mobile 1

Apr 26, 2008 | 02:18 PM

mustang_pa

4th Gear Member

Joined: Sep 2006

Posts: 1,033

From: Contentment

RE: quick question

I run 5-20W mobil 1 full synthetic with a tune. i know some people that use 5-30W with a tune. So i would say you could.

Apr 26, 2008 | 02:47 PM

Mark99GT

4th Gear Member

Joined: Feb 2004

Posts: 1,895

From:

RE: quick question

What is therelationship between an engine's tune and the weight oil it runs? Run the fuel your car is tuned for and run the weight oil the engine was manufactured to run. You could run either.

Apr 26, 2008 | 04:07 PM

bjh061487

3rd Gear Member

Joined: Jan 2007

Posts: 965

From: Philly, PA

RE: quick question

some people actually switch the oil grade depending on the season. in summer (i live just outside a philly) run 5w-30 but during the winter i run 5w-20