When should I use 5w50?

[SheepDog]

Jeff B. has a good price on this right now. I like a 0-40 for both my Stang and my F150

https://www.amazon.com/dp/B00JGQLZSU?psc=1&smid=ATVPDKIKX0DER&ref_=chk_typ_imgToDp

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[Optimum Performance]

Jeff B. has a good price on this right now. I like a 0-40 for both my Stang and my F150

https://www.amazon.com/dp/B00JGQLZSU?psc=1&smid=ATVPDKIKX0DER&ref_=chk_typ_imgToDp

Is that rated for DI engines?

 

[SheepDog]

Is that rated for DI engines?

It has the API SP rating, and meets the specs for various European DI engines

 

[MrMike]

Both are mostly accurate. Running a higher than needed viscosity oil is wasted energy. On the racing side, specific oils are available that do not have an additive package that is not required due to short drain intervals. In performance engines and some OEM applications the shape of the main bearings has changed and we no longer have large crush reliefs that dump excess oil causing windage. This change has reduced windage, oil pump size and increased oil pressure. This is worth HP and provides more oil to the rod bearings and allows for larger clearances.

Don't run racing oils in a street car and don't run thicker oils because you read it on a forum.

What oil do you run in your Mustang track car?

 

[Optimum Performance]

What oil do you run in your Mustang track car?

5-30 BG.

 

[Optimum Performance]

It has the API SP rating, and meets the specs for various European DI engines

Have you ever sampled it?

 

[VoodooIdo]

We are talking about the GT.. the gt350 engine drinks a quart every 2000 miles and it is a high strung race engine so totally different thing bro.. nothing to do with the topic here..

lol, my boosted 350 doesnt drink any oil.

 

[SheepDog]

Have you ever sampled it?

I never have. I generally don't exceed 3,000 mile intervals, and probably most synthetic oils would provide desirable results in such a short interval.

If you like to stick with the 5W-30 weight, the Edge extended performance oil Exceeds the API SP spec, and the ILSAC GF6 spec. Also at a pretty good price right now

https://www.amazon.com/Castrol-Exte...xtended+performance+5w-30,aps,271&sr=8-6&th=1

 

[GR1MxREAPER]

lol, my boosted 350 doesnt drink any oil.

Well you got one of the good ones then. The first couple years of those engines are junk lol.. they either blow up or drink a ton of Oil. Racecar problems .

 

[S550HPP]

I use 5W40 Pennzoil Euro Synthetic on everything gasoline. Delivers low temp flow and high temp protection.

 

[Trace]

0W-40
Or
5W-40
Euro Spec
Castrol
Shell GTL (Pennzoil/QuakerState)
Mobil
Member Engineermike did his homework and Redline 5W-50 is his go to.
No reason for you to jump to 50wt.
Euro xW-40 IMO.

I am running Mobil 1 5w40 Euro spec

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