1986951

I'm sure this has been discussed a good deal, but with recent changes in Oil technology, its always good to get a fresh consensus on what is recommended .

Lets limit the comments to the aircooled 911's... the water pumpers probably have their own set of guidelines...

Back in the "Day" (like, 1968 thru 1973), I always used Castrol 10w40 or 20w50 if I was racing in the summer, in my various 911's (L, T, S), with good experience, but then I was sort of fanatical about frequent oil changes... 3 to 5K per fill.

So, what is the latest recommended Brand and Weight for both Multi Season and Summer racing useage??? It's going into my '83 SC, if that makes a difference. No useage issue beyond "Normal" (about a quart every 3K miles), which seems pretty good IIRC.

Thanks folks!

Amber Gramps

this always starts a fight. castrol gtx 20w 50

I've been told even god uses it in his porsche.

theiceman

This has never come up ....

I think the conclusion is use the manufacturers spec since the car as designed around that oil with bearing tollernaces and clearances for that oil . I still use valvoline VR1 racing 20 w50 and that seams to be pretty common . Castrol seams to have fallen out of favor with some and others use synthetic. But I change every 5000 Kilometers and I have 0 oil usage in that time

slapshot1997

I've always used 20 w 50 conventional oil ( I prefer Valvoline Racing). I try to use my 88 911 year round (it is not a daily driver though) and I've not encountered any trouble with this. I must admit that this stuff is probably a bit heavy/thick for temperatures that are below freezing though (I don't use the car much if at all in those temperatures anyways, so thats not a worry for me).

Remember, the time that you should really start to worry about oil is when the car STOPS leaking it!

mo_gearhead

Put me in the Valvoline 20-50wt section also. This my first Pcar, but I have used that brand of oil in EVERY engine I have built! (starting in 1968!) Yikes ...I'm ancient!

KC911

I used to use Castrol many years ago in non p-cars, but I've read enough negative feedback from respected 911 engine builders, so I'd opt for something else, but YMMV. I use Kendal GT1 20w50. Valvoline Racing, and several others are good choices for dino, Mobil 1 (15w50) would be the synthetic of choice by most.

Keith
'88 CE coupe

theiceman

Hey I think Valvoline should sponsor us .. :-)

GothingNC

Time to pop some more Apspirin

I switched from Castrol GTX to Rotella T 15W-40

Next oil change I will use Valvoline VR1 racing 20 w50 per Iceman since he seems to be use the proper "Stick" to hold up the deck lid.

I'm rootng for Ottawa now

John

KC911

But, but, but....what about the 'Canes ?

GothingNC

They're down the road from me playing golf

John

GrantG

Swepco 306 15W40

RS Ben

I just ordered some Brad Penn oil, suppose to be good stuff. Interesting write up on oils, see link below.

http://www.lnengineering.com/oil.html

theiceman

Actually I have heard that Rotella T is very good , still has lots of the aditives that were taken out of other oils for emmisions and was Porsche factory fill back in the day ... If you are using Rotella and like it I would say stick with it, fair bit cheaper and you can get it in the big Jugs. In fact I may try it next.

Ps being a leaf fan and golfing along side the Cannes I naturally HATE Ottawa.. bunch of wanna be's . Sure they might get past Barfallo but I want to see a bunch of seasoned old geezers kick there *** al over the ice, Have Chelios give Krusty the clown ( Alfredson ) a good pitch fork...

oops .. got a ittle off topic there ...

theiceman

Great article Ben ..

But I am always suspicious when i see there recomendation , and at the bottom of the page they are selling it ... they may be impartial but I do wonder..

KC911

Oops, shows what a hockey fan I am...but you can bet I was on the bandwagon last year

Keith
'88 CE coupe