I know a lot of guys with turbo cars that hillclimb/track around here use Motul. Pricey, but highly regarded.

Personally, I use 5w-40 Rotella T6 Synth. Pretty cheap and it seems excellent in all the UOA I've seen.

 

I tested a bunch of oil with my pressure gage and Mobile 1 was one of the worst for pressure, 9-11psi at idle when hot and 27psi under cruise. You know about the Saab racing team having multiple failures with Mobile 1? They had to switch to another brand and the failures stopped. Automotion states NO MOBILE 1
Castrol tested as bad as Mobile 1, the good ones were Rotella, 5w-40 and Valvoline tested great, the max life tested 23psi at idle and 45psi at cruise, synthetic Valvoline tested good. Royal Purple tested decent and Amsoil tested very good, I ran 15w40 for a while and the very best that I tested was Redline 10w30 and 40, the best of the best!

Race car gets Redline, the street cars get valvoline, Rotella or Royal Purple...

I always run full synthetic in a turbo car to avoid cocking and I run 10w30 in the winter and 10w40 in the summer.

John

 

Im personally an amsoil fan at this point, you can sign up for an account and get a case for like 100 bucks.

some good insight might come from reading the oil analysis thread on evom, as our 4g63's produce an ass ton of heat and a lot of people have done analysis after track days and such to see wear.

 

kinda want to stick to one of the brands ive listed
red line is a lil too pricey for it being my daily (if i tracked then things would be diff)

oh and a big point... im not really asking what everyone uses
since thats how everyone usually responds to these

im also looking for figures, things to look for on the label, etc...

 

well personally after what ive read and seen...i wouldnt run any of those in a daily anyway so.

google information on oil groups. and read the information in i think my rp/m1 testing threads.

 

rotella.... interesting, might have to research that more... the gallon jugs are always pretty cheap.

 

^ But remember, the T6 is what you want. Usually high twenties / low thirties for a gallon.

 

check the price of the qts too... sometimes its cheaper to buy it by the qt and not the gallon

 

True.

Has anyone seen T6 by the qt? I am in SE PA and I have never seen it (and I always look / occasionally ask).

 

Wal Mart has the T6 by the quart and the gallon.

 

I get a gallon of t6 for 20 bucks at walmart..thats what ive been using since i switched from Mobil1

 

Take a look at royal purple hps. I haven't personally used it yet but when I have to change the oil on my car, I'm going to give it a go. Check royal purples website, they have a lot of good info about HPS

 

Look for the ACEA A3/B3 on these oils and see if it meets the spec (or has a HTHS of 3.8). Also check the cSt @ 40 ºC and at 100 ºC and find something that holds its viscosity well. You'd be surprised what the facts sheet show on some of the oils.

 

I always use Royal Purple 5W 40. I know this was not in your list but it should be.

D-

 

If your not running a cat I have heard a lot of great things about the valvoline race formulas, high zinc and phosphorous and about the same price as your average synthetic.

 

Every oil review I've ever read say Rotella 5w40 is exellent oil
There is no reason to but these "boutique" oils
They are overpriced

 

5w30 mobil 1. nick t mentions it somewhere on his site. over 500whp with it too

 

that is a horrible oil.

 

X2, No Mobile will every go in any of my turbo cars, the viscosity is way too low for a turbo engine, I tested a bunch of oils and it was so low in oil pressure, down to 8-9psi at idle after some pulls, the oil light would have been flickering, if I had had one Valvoline max life tested at 22psi at idle, RP was good, Castrol was also very low, there were multiple failures on the Saab Racing team with Mobile 1, in case you missed it the first time, they finally switched oil after a few bottom end failures and the failures stopped. Ed's car on the dyno with Mobil 1>

I would never ever trust that oil, decent priced oil, Valvoline or Rotella, the RP, really good oil, Amsoil or Redline.

I have been pushing engines to over 500whp for years and you can tell what works and what does not work well... Try running a dino oil and getting it extremely hot with some turbo power and then see what kind of cocking you have in the oil pan after a year or two,

John

 

X2, No Mobile will every go in any of my turbo cars, the viscosity is way too low for a turbo engine, I tested a bunch of oils and it was so low in oil pressure, down to 8-9psi at idle after some pulls, the oil light would have been flickering, if I had had one

John

this i just saw today right after coming off hard throttle... it didnt go all the way down to 8psi, but it did drop down to 11-12 psi

ya oil will be drained and filled with Rotella next time i drive the car to the shop

 

its great oil if you want bearing material in your oil pan...

ive got rotella sitting on my bench waiting for when i replace my trans, my rear main, and drop the pan to see how everything is doing inside.

 

I just switched from Mobile 1 to Rotella 5w-40.

 

My .02, I've used m1 10-30, 5-30, 0-40, etc in a variety of cars & family's cars for many, many years without issue. Never had any pressure issues or sludge problems.

That said, I've switched to amsoil 5-40 in my viggen because it's just a better oil and the UOA numbers don't lie, and it's recently been added to my local parts place for $8.50/qt

 

I too made the switch just recently from M1 to Rotella due to a not so hot UOA.....

 

I have been using penzoil ultra 10w-30 for a while with no issues. Has anyone done a analysis on this oil yet in a saab?

 

The one thing I have always heard from everyone from racers to my machine shop is that Pensoil is made from a base that has perrifin waxy build up and that is another oil that I was told with vigor to avoid at all cost. The waxy build up can clog the pick-up screen and cause low oil pressure issues,

John

 

that is exactly correct.

 

I don't believe Pennzoil Ultra is the same as the old yellow bottle pennzoil with the perrifin base. I ran the P-ultra in my 9000 for 25000 miles and there was no build up on the oil pickup screen when I dropped the pan. All the oil analysis I have read have been very impressive. I would like to know what the oil pressure readings are with this oil.

 

I don't believe Pennzoil Ultra is the same as the old yellow bottle pennzoil with the perrifin base. I ran the P-ultra in my 9000 for 25000 miles and there was no build up on the oil pickup screen when I dropped the pan. All the oil analysis I have read have been very impressive. I would like to know what the oil pressure readings are with this oil.[/QUOTE

They get the base from the same place, at least that is what I was told and just the possibility its not up to par is enough to make me stay clear, do not like to take any chances and stay with the ones that have proven to hold up to the high stress of a turbo charged engine and that also passed my own pressure testing,

John