Anyone use Rotella T diesel oil in their gasoline e30?

[xwill112x]

Which engines?

non vanos m50, m42, m52, 4.0L jeep, 351 in my f150

[Emre]

mobil ones m20 test used 14k oil changes to reach 1 million miles. 15 50 w btw.

One thing I've learned about oil is that you can't go by the labels anymore. Companies change their formulations (even including their base stocks) without any notice.

The Mobil 1 they ran in that 25-year-old million mile E30 commercial has almost nothing to do with the Mobil 1 you buy at Walmart for $30 a gallon. It used to have a PAO (Group IV) base stock; now it's hydrocracked petroleum (Group III). It used to have loads of ZDDP; now most grades have little/no ZDDP, while other grades still have reasonable amounts. To complicate things, you can still find the original Mobil 1 formula in some European markets. It's a mess trying to figure out what you're getting.

It's the same with Shell Rotella T6, Mobil Delvac 1300 Super, and Chevron Delo 400. Guys like us started running diesel oils like these because passenger car oils were forced to drop their ZDDP levels for emissions purposes, but diesels were exempt. But as of 2 years ago, diesel oils also have to meet modern "low emissions" standards and the formulas have changed. Based on everything I've read, Rotella and Delo no longer have the high levels of ZDDP they used to have, but Delvac is still good with 1300 ppm. Who knows when Delvac will also change?

Bottom line: brand names, marketing hpe, and even the word "synthetic" are meaningless. You need to do your research.

Based on my research, I've become convinced that Brad Penn PG-1 in 20W-50 is the best oil for hard-driven M10, M20, and M30 engines. For the S14 (and the similar M102 Cosworth engine in my Mercedes), I think Amsoil Dominator RD50 in 15W-50 may be better just because the base stock is of a higher quality.

[stamar]

no i mean 0 w 40 but 10 40 is fine

oil nerds will tell you that 0 w 40 mobil 1 is entirely different than all of the other mobil 1 its euro synthetic oil.

I personally use oreilly synthetic and napa synthetic what they are is major manufacturer oil without the full additive blend.

One is canadian brand motul, which is sold in the us as mobil 1 one is valvoline synthetic... which at full price isnt worth it but at 3.50 its nice.

only when they are on sale like right now.

I change the oil on 4 cars so I get whats on sale, I get the cheapest synthetic and dino oil.

only 1 requires synthetic its a 2005 ford f150. It recomends synthetic blend actualy.

[M3Philipp]

I am running 5w40 in my 318is M42B18, full synth engineoil.
Maybe go for 0w40 for the next oilswaps.

15w40 or 20w40 it not even close as liquid when the oil is cold, but as liquid once the engine is warm.

Meaning when your engine is not yet on temperature, it will be the worse oil.

But people all know it best on their own, it does not make sense to discuss this out in the internet, as everyone will recommend a different kind of oil.

[Vivek]

You know im just going to make this short. I dont actually own a m42 or frequent the locals forum to hear what m42 people like but heres the long and short of it

bmw designed the m42 for fully synthetic oil. bmw recomends LL-01 or LL-98 approved oil.

In general that is only mobil 1 and castrol euro oil. Depending on how you drive it it is the type of motor that best for synthetic. I dont actually know if rotella synthetic even makes it im not that much of an oil nerd.

the best oil for the m42 is mobil 1 o 40. That is basically bmw oil..... comes from the factory in bmws. or bmw synthetic oil...

if you have a dino oil m42 I dont guarantee it wont release sludge that causes a leak. I cant tell from over a distance that specific a situation. I doubt it would though. and if I put my m42 in its high rpms a lot i would rather have synthetic and leaks personally.


the m20 might be the last motor where they didnt recomend fully synthetic oil... I dont have all the data in front of me. the m30 maybe.

Did you mean 10w40? I'll see what I can find/what's on sale, etc. Kragen might be a good choice in that case (and walmart is super far). I don't push it hard consistently, but I do take it to 6k occasionally, I've yet to hit the rev limiter.

[AndrewBird]

FYI, the "W" in 20w50 (or whatever oil grade) does not stand for weight (as in viscosity), it stands for winter. The first number is the equivalent weight at 0ºF and the second number is the equivalent weight 210ºF. Hence the term, multi-grade oil; it's viscosity changes.

[stamar]

You know im just going to make this short. I dont actually own a m42 or frequent the locals forum to hear what m42 people like but heres the long and short of it

bmw designed the m42 for fully synthetic oil. bmw recomends LL-01 or LL-98 approved oil.

In general that is only mobil 1 and castrol euro oil. Depending on how you drive it it is the type of motor that best for synthetic. I dont actually know if rotella synthetic even makes it im not that much of an oil nerd.

the best oil for the m42 is mobil 1 o 40. That is basically bmw oil..... comes from the factory in bmws. or bmw synthetic oil...

if you have a dino oil m42 I dont guarantee it wont release sludge that causes a leak. I cant tell from over a distance that specific a situation. I doubt it would though. and if I put my m42 in its high rpms a lot i would rather have synthetic and leaks personally.


the m20 might be the last motor where they didnt recomend fully synthetic oil... I dont have all the data in front of me. the m30 maybe.

[Vivek]

without knowing whats in walmart I dont know. whats on sale etc.

If you want the zddp Id get the 15w 40 for the m20 and id get full synthetic 5 40 for the m42.....

for the one thats leaking, the thicker the better, and the cheaper too obviously. Its staying a bit fresher on its own.... so whats the cheapest 20 50 you can find?


oreilly has full synthetic on sale for 3.49 a quart right now id rather have that for the m42 I bet its cheaper 10 40.....

Why full synthetic? I just don't want anything to start leaking (kinda MAJOR pet peeve, really annoys me with the m20).

[stamar]

I'll be going to o'reilly's or walmart tomorrow to get a few gallons of oil. I'll be changing the oil in an m20 (128k) and m42 (193k). Since it doesn't look like rotella has 20w50, I guess 20w40 will be okay, or do you suggest anything else? It's warming up now, and its never really cold around here so too thick won't be an issue. Also, some fluid (not sure if it's motor oil) leaks quite a lot from this car, but there's no noticeable change on the dipstick.

For the m42, does rotella make 10w40? Or should i just use 5w40? I don't quite know the history of the engine, but it seems healthy and doesn't leak.

without knowing whats in walmart I dont know. whats on sale etc.

If you want the zddp Id get the 15w 40 for the m20 and id get full synthetic 5 40 for the m42.....

for the one thats leaking, the thicker the better, and the cheaper too obviously. Its staying a bit fresher on its own.... so whats the cheapest 20 50 you can find?


oreilly has full synthetic on sale for 3.49 a quart right now id rather have that for the m42 I bet its cheaper 10 40.....

[stamar]

Well it did not look new it was close to time to change it. It looked better on the dipstick than it did coming out which was kinda approaching black.... not overdue though could keep going some unknown amount of time maybe to 10k

definitely came out like water when heated with no sludge.

I dont know its totally apples and oranges , but same time period same oil, 12k full synthetic in a nissan d21 the oil was completely black and some sludge. past done.

I suppose I could send some to blackstone see how its going.

[priapism]

Everyones car is different. I just went 7k with the m20 with full synthetic and it looks new, changed it anyway. Would be confident at 10k.

Wow, the oil in my road car looks like hot chocolate after 2500 miles or so.

[Vivek]

I run rotella 15-40 in all my vehicles and it works great.

Which engines?

[xwill112x]

I run rotella 15-40 in all my vehicles and it works great.

[Vivek]

I'll be going to o'reilly's or walmart tomorrow to get a few gallons of oil. I'll be changing the oil in an m20 (128k) and m42 (193k). Since it doesn't look like rotella has 20w50, I guess 20w40 will be okay, or do you suggest anything else? It's warming up now, and its never really cold around here so too thick won't be an issue. Also, some fluid (not sure if it's motor oil) leaks quite a lot from this car, but there's no noticeable change on the dipstick.

For the m42, does rotella make 10w40? Or should i just use 5w40? I don't quite know the history of the engine, but it seems healthy and doesn't leak.

[McGyver]

i've used it. im not sure what difference i would notice, but i did go roughly 5k miles before changing my oil and its still running fine. then i found mobile 1 synthetic oil and filter for $30 at advance auto, so i used that for the oil change. i think the mobile 1 seems to be leaking out faster.