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Mar 17, 2008 | 07:22 AM

jmdgto

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From: sc

fi engine oil

which oil do most of you FI guy's use. i am stuck between rp xrp and mobile both 5w-30. tks

Mar 17, 2008 | 02:59 PM

jmdgto

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From: sc

does anyone use a different oil for their FI application or does FI require a different oil ?

Mar 17, 2008 | 03:03 PM

DanO

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nope.. just go with what the engine was designed for...

the only time you MAY consider looking into oil specifics is when your running a turbo and try to find out the best oil for that turbo.. but supercharged.. no issues.

Mar 17, 2008 | 04:20 PM

2000 Tran Zam

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From: Ahwatukee, Az

I think I used 15w-50 for mine but it was cause the motor was built very loose...

Mar 17, 2008 | 04:37 PM

Websy21

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From: Alberta, Canada

Quote:

Originally Posted by 2000 Tran Zam

I think I used 15w-50 for mine but it was cause the motor was built very loose...

wow, thats some thick ****

Mar 17, 2008 | 05:02 PM

ddnspider

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From: FL

Shell Rotella hands down

Mar 17, 2008 | 05:09 PM

bboyferal

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From: Miami, FL

I'm using Mobil 1 20w-50

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Mar 17, 2008 | 05:29 PM

DMH Fabrication

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From: Richmond, VA

Another vote for Rotella

Mar 17, 2008 | 06:36 PM

#10

BADBLUE02

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From: Smyrna De.

I'm still on the stock internals and use Pensoil 10w-30. My UOA's with 5W-30 showed it sheared quite a bit. A couple of people said they had lese shear with 10-30.

Mar 17, 2008 | 06:43 PM

#11

52172

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From: Buellton Ca

rotella 5-40 synthetic

Mar 17, 2008 | 07:21 PM

#12

DeltaT

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If you change your oil frequently, +1 for Rotella non-synthetic. The 5-gallon pail at Walmart is like $33 last time I checked, although it's probably $50 now

If you like to go 7500+ miles between changes, then the Rotella T synthetic.

Jim

Mar 17, 2008 | 10:11 PM

#13

Websy21

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From: Alberta, Canada

Holy rotella, I've heard the non synthetic reccommended several times for break in but haven't really heard anything for continuous use. This thread sounds promising, but I think I'd run the synthetic once its broken in. Easy to get and cheap. Hmmmm decisions, LOL

Mar 17, 2008 | 10:27 PM

#14

ddnspider

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From: FL

i run the synthetic and like it during most of the year.i may switch to non synthetic for the really hot summer months then switch back

Mar 17, 2008 | 10:39 PM

#15

gametech

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From: Stockbridge GA

Castrol 5/50 synthetic has been very kind to my boosted work truck for 266K miles so far, so I also use it in the turboed GTO. I doubt that the results would have been much different with most other brand-name oils. However, some aftermarket builds have different bearing clearances, so I would leave the choice of oil weight to the engine builder.

Mar 17, 2008 | 11:03 PM

#16

Project Dc2

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From: Bay area

ive heard about using diesel motor oil on turbo cars also.

i tried some cheveron delo400 in my 1995 single turbo supra and i notice the car spools a bit better and overall i think drives smoother.