JDS968

I know I haven't been around for a while, as I've been quite busy (and trying to avoid spending all my time on Rennlist.)

However, since motor oil seems to be a big interest here, I thought I'd mention this.





I switched from 15W-50 to 0W-40 about two years ago. The 0W-40 has been perfect on the street, but when I went to Sebring with it, I found that it did not have acceptable performance after extended periods of continuous high-RPM operation. Oil pressure in the 3000-6000 RPM range (usually at 5+ bar) dropped below 4 bar, which worries me. I'm going back to Sebring this weekend, so after mumbling about it for (how long? a year?) I finally ordered a case of this stuff. I will report my results when I get back from the track. Assuming it performs well, I'm going to start contemplating ordering a 55 gallon drum. It's only $3122.40...

sydneyman

hmm interesting... look forward to your update! ive been happy with VR1 but have always wanted to like Mobil 1... odd i know...

No HTwo O

Why not just run Mobil 1's 5W50? Porsche approved.

odurandina

just to clarify, when it says track use only, it would be more accurate to caution anyone running a catalytic converter that they should not use this oil.... Josh, i don't think you should buy a whole drum. even synthetic oil doesn't age well. otherwise, this is the best motor oil for our cars, period. i'm currently running a mix of 50/50 0w40 and 0w50....


if you could give 0w50 an exact number it would be about "3w48." because that's about what is... even so,


1. it's ~ 98 % as thick as regular 15w50 at running temp.

2. will beat any racing oil on earth for hp. one more reason why they make it.

3. saves gas on the street with zero compromises, nearly paying for itself....

4. it's the best winter oil for our cars. will flow well at startup down to about 5° F... but,

5. it's actually the best year round oil as well, as it flows better at 70° F than anything that offers maximum protection at running temp. in other words it has the widest viscosity rating of any oil that offers maximum protection for a Porsche 4 cylindar engine.

6. it's stable all the way to 500° F. not that any turbo or non-turbo engine for the street will ever get near there....

7. adds longer life to turbos, turbo engines and non-turbo engines, having 1800 ppm of zddp...




oil/SAE grade ................... visc @ 104° F............................. visc @ running temp / 212°F


Redline 15w50 ....................... 138 ............................................... 19.6

Mobil 1 15w50 ....................... 125 ............................................... 18

Mobil 1 5w50 Rally Oil ............. 108 ............................................... 17.5

Mobil 1 0w50 Racing Oil .......... 100 ............................................... 17.2

Mobil 1 10w40 ........................ 96 ................................................ 14.7

Mobil 1 0w40 .......................... 75 ................................................ 13.5

No HTwo O

I always thought this meant that the detergent package was different, and not capable of a long drain interval....vs the catalytic converter comment you noted. But maybe we are both right.

JDS968

I was specifically worried about that, so I just called ExxonMobil. The tech guy told me that "track use only" refers specifically to the catalyst-eating ZDDP levels, and that it has a detergent package comparable to other versions of Mobil 1.

And no, I'm not REALLY buying the drum. And just for that reason, I know I couldn't use it up fast enough. If I knew it would last indefinitely, I might actually consider it. Maybe.

I just wish it were available in some in-between size, like gallon or 5-gallon jugs. Some way to buy in bulk on a home-user scale, not a fleet scale.

No HTwo O

Give Petroliance a call, and ask them- 800-628-7231.

xschop

I am running a blend of synthethic because the full synthethic causes small seepage. I have NO CATS, and if I did I would not run ANY oil that had high ZDDP. Zinc and Phosporous binds to Paladium and Platinum instanly and ruins cat-converters in no time.

No HTwo O

How high is "high"?

odurandina

anything over 600 really.

people accuse Mobil 1 of taking the zddp out to save money. the automakers forced them to do it.

the 0w40 is a euro engine oil and it's pretty high in zddp. as well as your 15w50....

i believe their 5w50 Rally Oil has a little more, but the 0w50 has the most.

Mobil 1 has a chart on their website for all the oils.

i'm busy finishing the nose on the car so i don't have time to look for it.

JDS968

Assuming I'm happy with this stuff, I'll give them a try, thanks.

Synthetic oil doesn't CAUSE seepage...it just dissolves deposits (carbon deposits, waxes, varnishes, etc) that are plugging up improperly sealed gaps, and then it seeps out. In other words, it doesn't cause the problem, it's just making an existing problem more apparent, which dinosaur oil covers up.

I'm not sure it was exactly the automakers...I think some combination of the EPA and the API was the real driving force behind this. Hard to tell for sure. But the newer API certifications actually LIMIT ZDDP content for the common viscosity ranges, which is insane (although apparently unusual viscosities like 0W-40 and 15W-50 can be API certified with the higher ZDDP levels, not sure why). And Mobil 1 Racing 0W-50 is NOT marked with any API certification at all.

I have a copy of the product guide with the ZDDP levels.

800 PPM P, 900 PPM Zn:
0W-20, 0W-30, 5W-20, 5W-30, 10W-30, 5W-20 Extended Performance, 5W-30 Extended Performance, 10W-30 Extended Performance

900 PPM P, 1000 PPM Zn
5W-30 High Mileage, 10W-30 High Mileage, 10W-40 High Mileage

1000 PPM P, 1100 PPM Zn
0W-40, 5W-50

1200 PPM P, 1300 PPM Zn
15W-50

1750 PPM P, 1850 PPM Zn
0W-30 Racing, 0W-50 Racing

Miles968

FWIW
I have been using the 0w-50 for spring/summer/fall and 0w-40 for winter. In winter the car is hardly driven, rather moved from garage to garage or service and started weekly

dougs968

As far as I know, my cat has never been replaced. If mine is the original then it will be 20 pretty quick. Since higher than recomended levels of zinc and phosporous are in 0w50 by almost twice what 0w40 has, would it be reasonable to assume that a cat would be ruined nearly twice as quick? How long are catalytic converters supposed to last when exposed to zinc and phosporus?

I guess I'm more interested in preserving my engine with performance gains than my cat.

Doug

JDS968

Do you ever track it? And is your turbo oil/water cooled or just oil cooled?

I do hope you're doing more than just starting it, that would be worse than just letting it sit...

That's PROBABLY true, but it's hard to be sure whether it's a linear relationship. Has anybody actually experimented with this?

If you think about it, this car was designed in 1992, probably under the assumption that it would always be run with the same [higher] levels of ZDDP that they had in 1992.

I don't think cats have any particular "official" life expectancy, but the federal government requires all manufacturers to warranty them for 10 years, so that's probably a good benchmark.

Yours? It's served its tour of duty, anything else is just gravy now.

odurandina

bump for fine wine and killer motor oil.