Which / What Oil Should I Use? [Merged]

[bboyalan]

I've been using 10w30 Mobil1 Synthetic High Mileage in my 3000GT VR-4 and have experienced great results. I tried Castrol GTX 20w50 and it created rough cold starts and excesssively high oil pressure - too heavy! My previous DSM also received the Mobil1 treatment.

Anyway, your oil change interval is equal, if not more, in importance.

 

[Oliver@Slowboy]

Brad Penn 20w-50 over here.

Oliver
[email protected]

 

[66ss]

what oil are you guys running? my cars a 91 gsx, 48k orig miles, i did some lite mods (turbo back, chip, hard UICP)

iv been putting just castrol gtx 10w30 in it but just wanted to see what everyone else was runnin

i know in my race car (small block chevy) i run the vavolin vr1 race oil, its a non synthetic with a high zinc additive, dont know if its good for daily driven turbo cars

o yea this is my daily

 

[cookmeup272]

Castrol 10w-40 conventional

 

[Misterbeechy]

Mobil 1 10-30
any 10-30 incase of emergency

soon switching to
Royal Purple!

 

[GIRman67]

Royal Purple 10W-30

 

[TuRBoTaLooN]

I use Mobil 1 Full Synthetic 10w-30 on my built motor.

 

[JusMX141]

Mobil 1 10W30 in daily drivers, 15W50 in race-only cars that don't see much street use.

I'm also impressed by the Brad Penn Racing Oils, as well as their price ($3.59/qt at my workplace). The Brad Penn 15W40 is what saved Dave's fresh engine build from a shitty Top Line oil pump failure in it's second trip to the track earlier this year.

Never use anything lighter than 10W30 in a 4G63; it's only recommended for climates where the temperatures never exceed 60*f.

 

[chenk18]

+4 for mobil 1 10w30

 

[RednekBubba]

Pennzoil Ultra full synthetic 5-20

 

[2GbTalonGuy]

Royal Purple 10w-30

 

[cookmeup272]

Pennzoil Ultra full synthetic 5-20

Is this a fresh motor?

 

[99gst_racer]

Brad Penn 20w-50

I ran Valvoline Syn-power 20w-50 for years and it's a great oil, but it's also twice as expensive as the Brad Penn stuff and has less zinc.

 

[james3340]

Mobil 1 5w-30

 

[V8killerturbo4]

Mobil 1 15w-50 Race Oil, built motor on a daily too. I like the extra cushion.

 

[RednekBubba]

Is this a fresh motor?

Has almost 16k on the motor now.

 

[Limegrntaln]

Brad Penn 20w-50

I ran Valvoline Syn-power 20w-50 for years and it's a great oil, but it's also twice as expensive as the Brad Penn stuff and has less zinc.

Brad Penn 20W-50 per Forced Performance recommendation, off the shelf (non racing) Mobil 1 not recommended.

http://store.forcedperformance.net/...Performance Recommendations for Motor Oil.pdf


:::Caution on the high zinc, may shorten the life of catalytic converters:::

 

[rich3389]

Rotella T6 5w-40

 

[olddsmer]

There is a bulletin on "Forced Performance" website.
It states if you are much over stock horsepower, you need 20/50
oil to protect your motor and turbo. There are some recommendations
in the bulletin. I believe it sites thrust bearing issues are minimized
when you use 20/50 oil.

Regards
Greg

 

[Vladimir]

i use 10w 30

 

[MY1GDSM]

There is a bulletin on "Forced Performance" website.
It states if you are much over stock horsepower, you need 20/50
oil to protect your motor and turbo. There are some recommendations
in the bulletin. I believe it sites thrust bearing issues are minimized
when you use 20/50 oil.

Regards
Greg

I'm personally not sure about thrust bearing damage to turbos...
But if Anyone has plans of revving to 8-9k You'll need a higher viscosity Oil then 10w-30 Or the oil pump won't survive

 

[2GbTalonGuy]

Royal purple 10w-30.

 

[ThomasGSX]

Royal Purple is great if you can afford it, however, I use Castrol Syntec 5W30, it works fine, although, my lifters do tend to tick...

 

[JusMX141]

I use Castrol Syntec 5W30....although, my lifters do tend to tick.

I suppose it never goes above 60*f in your part of California.

 

[EclipticalGS]

brad penn 10w40