when mobil one 15-50 is gone, what will you use?

[donstevens]

Amsoil 20W50.

https://www.amsoil.com/storefront/aro.aspx

I have used this product for years, early 911s included, with great success. Amsoil has been blending premium synthetic (often using Mobil base stocks) for extended drain intervals for more than 30 years. It is the real deal.

Don

[blue82coupe]

John.. hope your wrong.... been 15W50 junkie for a long time..LOL Dan

[jacko241]

Me too, I have run it in my late model stock cars, Ferrari, Porsche, RX-7, Spec racer..etc

[jaydubya]

Originally posted by donstevens
Amsoil 20W50.

https://www.amsoil.com/storefront/aro.aspx

I have used this product for years, early 911s included, with great success. Amsoil has been blending premium synthetic (often using Mobil base stocks) for extended drain intervals for more than 30 years. It is the real deal.

Don

I used Amsoil 20-50 for a few changes back when I was living in Tucson and tracking my car regularly in Phoenix. I tried it based on a suggestion from a local porsche mechanic / friend that said it would help with engine temps. I did notice an improvement on the track (about 5 degree reduction in oil temp), but it caused leaks (that went away after going back to Mobil 1 15-50).

Good stuff though if you have a tight engine...

I thought it was a full synthetic but I could be wrong. Maybe they have multiple 20-50 products?

John - I would be happy w/ Mobil1 10-40 if the 15-50 was not available.

[AFJuvat]

We are using the extended 15W50 from mobil-1 and keeping our customers on the same schedule - 1 year\5K miles for Mob-1.

No adverse effects noted.

AFJuvat

[Kmatts]

John, I was always happy with the Kendall you recommended for my SC. assuming their synthetic is equally is good, then why not stick with that? I've got the mobil-1 in my 993 and i'm sad to see it go.
Cheers,
Kyle.

[RickM]

I'm not doubting John but I'll write to a customer rep at Mobil and see what he has to offer.

[silverc4s]

I plan to continue with Mobil One in all my vehicles; just change to the Extended 15W 50, hopefully as available as the old red cap was...

[nostatic]

I use this in the bike...maybe it will work in the car



Only dino in my SC though...

[Steve@Rennsport]

I spoke with someone at E-M several weeks ago and there are no plans to discontinue 15w-50 from the product line.

[silverc4s]

Nostatic,
I did some research a few weeks back, and it became apparent that the molecular build for a motorcycle oil has different requirements than an automobile oil. Mainly because virtually all bile oils are running in the transmission as well, so the shear strength is very different.
At least that is what comes to mind tonight. There are some good writeups out there, i will find them & post tomorrow..

[msterling]

Must still be some in the "pipeline". I bought some fivers of 15w50 (red cap) at Wally World last week. Seemed fresh too although I didn't note the born-on date.

[Early_S_Man]

Castrol Syntek 5W-50

[steand]

A lot of us in my country use CASTROL RS 10W-60
It seems like a better choise over Mobile1 10w-50,
since it is thicker at higher temperatures.

From their homepage:

<<<<<<<<<<<<
Castrol Formula RS 10W-60 is a fully synthetic engine oil that offers exceptional engine protection in performance driving conditions, it is race proven for high temperature protection and high performance.
Aids your engine in operating cleanly with reduced emissions and reduced noise levels
Low viscous drag ensures superb cold start and rapid circulation in cold temperatures
>>>>>>

[M.D. Holloway]

Originally posted by john walker's workshop
but is it commonly available? don't recall seeing it anywhere.

The STRATA XTREME is sold B2B, no retail. The 20W50 is in for API approval and should be though it by September. The other grades are available (5W20, 5W30, 10W30 and 15W40). Send me a shipping address and I will get some out to you to try gratas!

[M.D. Holloway]

Originally posted by silverc4s
Nostatic,
I did some research a few weeks back, and it became apparent that the molecular build for a motorcycle oil has different requirements than an automobile oil. Mainly because virtually all bile oils are running in the transmission as well, so the shear strength is very different.
At least that is what comes to mind tonight. There are some good writeups out there, i will find them & post tomorrow..

Great Point! Motocycle engine oils do behave differently. They actually have to act almost like a torque fluid used in universal hydraulic systems (like back hoes and farm equipment). This type of fluid also has to lubricate the hyrdostatic trans and act as a wet break fluid and a power steering fluid. The balence bewteen friction and lubricity has to be spot on. Those are not the worries in an engine oil.

The motorcyle engine oils have a few roles to play as well. Not sure what would actually happen if you put it in your p-car...you may get an ash build up, you may increase the varnish layer on your rings, you may start seeing pink polka dots at the red line.

I have heard of guys putting in some 80W90 gear oil in the crank case with the engine oil - these were aircooled diesel engines. They swear it worked great. Of course these were not their engines but rather the companies...

[yasir]

Walmart has 5 Q Mobil-1 0-40 for $19 but the label says it's for SUV's and for diesel engines any reason why we can't use that in our cars ?

[M.D. Holloway]

If it is truely formulated for diesel engines it will have a higher TBN (from 12 to 14) - that would actually be really good for your aircooled engine - less chance of depsosit formation. The thing that gets me a bit worried with the 0W40 is that it might be a tad to thin for your Porsche engine, the Turbo you have will beat the ***** out of the oil. I think you really need something in the 15W50 or 20W50 range (unless the 15W40 or 10W40 has been working for you.

[Shaun @ Tru6]

I recently sold the motor out of my 84 with 241K miles on it. One owner in CA through 180K who only used Valvoline 20-50 dino according to records, I only use Kendall GT-1 (dino) every 3K to 4K max. Motor was strong but burned oil at the high end of spec and the deal was a real win-win, so I thought before something major goes, trade it in.

here's the email I recently got back when the buyer, YTNUKLR, opened it up:

"Shaun, I got your 3.2 apart. Damn, you must have changed your muthafukin oil a lot. 241K(?) and it looks like new, inside. The cylinders--not even a scuff, hardly a few vertical lines. Pure sugar. Muchos gracias, and I still need to try peach salsa."

I can say that putting a "fresh" 3.2 in with only 103K on it has given me back a good 20hp.

[yasir]

Mike H,
Factory recommendation ( manual ) is 0W40 ?