20w50 oil? I need help guys.

[ernie9944]

Originally Posted by princej

hi, if I cannot find anything locally that says GL-4.

ill look online for a part supplier in canada for redline mt-90. I have read very good things about it and swepco 201.

as long as the product is in Canada, i dont mind paying for shipping , just not duties and such.

Ill be interested to see the condition of my gear oil now as shifting is not as smooth as it should be.

If you buy Valvoline it's got to be this one(see pic) John AZ is using it in his 924S & according to him there is no problem, otherwise just go with Castrol synthetic 75W90.I doubt very much you'll be able to find Swepco up here,I did try but couldn't find any supplier in Canada, but found some Red line up in Montreal.

[Gawernator]

Ernie, one size fits all Gl-4/5 and MT-1? .....

[princej]

thanx for that, i actually just found redline mt-90 in the west island of Montreal for $35 a quart.

ouch.

they also have royal purple for $20 a quart.

[Gawernator]

Well if that Valvoline says it meets GL-4, try it out

[princej]

the royal purple maxgear 75w90 says it also meets gl-4

I read mixed reviews on Royal purple, so ill probably stick to the valvoline, castrol and the redline.

[princej]

also, of note, the castrol syntrax data sheet specificlaly mentions Porsche on page 2

http://www.castrol.com/liveassets/bp_internet/castrol/castrol_australia/STAGING/local_assets/downloads/s/Syntrax75W_90_B1278983.pdf

[ernie9944]

Originally Posted by princej

also, of note, the castrol syntrax data sheet specificlaly mentions Porsche on page 2

http://www.castrol.com/liveassets/bp_internet/castrol/castrol_australia/STAGING/local_assets/downloads/s/Syntrax75W_90_B1278983.pdf

Not my money but if it was me I'll go with red line you won't regret it ( lots smoother shifting in my case same for Gaw)Btw you will need 3 quarts & you'll have a little bite left over.

[Rasta Monsta]

Originally Posted by 9FF

Rasta, its a common mistake but please don't confuse Porsche "approved oils" list produced every few years with the factory oil recomendations in the manual. Porsche (and other manufacturers) produce those "approved" lists occasionally when they come to agreement with oil manufacturers for oils they use in their shops. They are NOT what was recommended for our engines. Again...search if you think I'm bs'ing you.

Done, and you are wrong. Following is the viscosity chart from the factory per TSB 36/08, dated September 4th, 2009. Please note that no manufacturers are specified, and that many manufacturers produce the weights listed, so the above argument is sadly mistaken.

[9FF]

Quote de 9FF

Rasta, its a common mistake but please don't confuse Porsche "approved oils" list produced every few years with the factory oil recomendations in the manual. Porsche (and other manufacturers) produce those "approved" lists occasionally when they come to agreement with oil manufacturers for oils they use in their shops. They are NOT what was recommended for our engines. Again...search if you think I'm bs'ing you.

Done, and you are wrong. Following is the viscosity chart from the factory per TSB 36/08, dated September 4th, 2009. Please note that no manufacturers are specified, and that many manufacturers produce the weights listed, so the above argument is sadly mistaken.

Rasta, do as you wish I'm just putting the facts in front of you from the experts and my posts are based on them, not just what I'm dreaming up. You have just posted part of the TSB from 1998 of "approved oils", Porsche A40 list doesn't apply to our older cars. Read what Bruce (Jet951) has to say about the A40 spec and our engines and oil (post 9). He is a long time well respected poster over on rl: porsche a40 oil specs ? - Rennlist Discussion Forums

[mueller944s2]

Mobile 1 15w-50 is what I prefer, but since I don't want oil leaks everywhere I run VR1 20w-50. My dad mixes V-Twin and the VR1 in his 911s. I have higher oil pressure with the VR1, but that's expected. As for tranny, Redline!!!!! I had the engine out for 9 months a few years ago and when I got it running again it took FOREVER to shift. Push in clutch, move to neutral, give it a couple seconds, put in next gear. Put in Reline and it did a world of difference.

[Rasta Monsta]

Ok, you are right, running 5w40 synth per 2009 factory recommendations instead of 10w40 dino oil as recommended thirty years ago is definitely going to destroy my engine.

OP, you have my apologies for giving such awful advice.

[Gawernator]

20w50 woohoo

[Aussie944S]

20w 50..... not sure why this is such a hard thing to understand..... each to there own I guess.

[VINMAN]

Been running Castrol GTX 20w50 for over 300,000 miles. I also run 15w 40 diesel oil every couple of oil changes.

[mattdavis11]

Valvoline 20w50 and Amsoil 75w90. It's been ten years since the gear box oil has been changed and it's still like cutting through hot butter.

Different climates require different a viscosity. Find what is to your liking.

[VirginiaF1]

Originally Posted by VINMAN

Been running Castrol GTX 20w50 for over 300,000 miles. I also run 15w 40 diesel oil every couple of oil changes.

Howdy..
Do you run the car during New Jersey winters or park it?
If so, using the 20W50 or the 15W40 ?

Thanks!
mikey

[9FF]

Originally Posted by mattdavis11

Valvoline 20w50...Different climates require different a viscosity...

Originally Posted by VirginiaF1

Howdy. Do you run the car during New Jersey winters or park it? If so, using the 20W50 or the 15W40 ?

20W-50 will cover most winters down to -10; 15W-40/50 down to -15; 10W-40/50 down to -20. I suppose if you live in Iceland and only drive in the winter you could use a 5W-30 which will cover you from zero to minus 30. All these viscosity's are recommended in the manual, just make sure the oil you select has at least 1200ppm zddp and you're gtg.

[VirginiaF1]

Originally Posted by 9FF

20W-50 will cover most winters down to -10;

Howdy...
yes, -10Celsius ( or 14Fahrenheit )... Page 111 of owner's manual.

But the Cold Cranking Simulator specs on 20W oils in low temps seem pretty sky high...

I know my old girl started much more easily this winter with 5W-40 synth.. vs. 20W50 in 2011.
Going back to 20W50 for summer here..

Good thread.. Always love the passions that Oil Threads surface.
Cheers all..

[944sracer]

Valvoline 20w-50 VR-1 conventional for non-turbocharged motors. The key here is the temperatures that the 50 weight will be able to handle for the given tolerances.

Your motor is older both in design and miles so you have some "loose" tolerances. The heavy weight oil will help lubricate better. It also has the higher ZDDP content.

For Turbo motors I run the Valvoline 20w-50 VR-1 synthetic due to the bearings of the turbo.

STAY AWAY FOR REDLINE! It eats syncros! Use the Swepco from either this site or *****************.

But like everyone else on here I'm an expert too. hahahah!

You can run a lighter weight if you have tight tolerances. Our Cup car runs Mobil 1 0w-40 Synthetics

[Gawernator]

How does GL-4 fluid eat synchros?