Mobil Delvac 15W40

[dnguyen1963]

Have any of you used this oil in your car? Is it comparable to Shell Rotella T?

[Bearmw]

I know a reputable engine builder who likes Delvac for the straight six.

[dnguyen1963]

My brothers-in-laws use Mobil products. I have been using Shell...just a curiosity.

[immajackuup]

Mobil 1 syn 0w40 here

[canadiankid]

What mileage should you start changing oil, ie what would you recommend for an ix with 150xxx miles. Cost is no object, my baby only gets the best.

[nando]

Mobil 1 syn 0w40 here

I hope you don't like your cam lobes. ZDDP on that one is pretty low.

[E30RedtopSR]

Diesel oil formulated for large displacement diesel engine is fine for a gas motor, if you never rev it past 3500 rpm. Also the detergency and additive package is formulated for gas engine more often than not.
the "s" in api rating is for gas. "c" is for diesel.
Anti foaming/cavitation additives are not up to the task.

Mobil 0/40 has more zinc than than thier conventional 5 and 10/30.

I can provide zinc/phosphorous PPM specs for all the mobil oils if you are interested.
Highest content is in thier racing 0/50.
Next, that wont kill your converter, is the 15/50. This is what I run.

Just my two cents.

[nando]

Diesel oil formulated for large displacement diesel engine is fine for a gas motor, if you never rev it past 3500 rpm. Also the detergency and additive package is formulated for gas engine more often than not.
the "s" in api rating is for gas. "c" is for diesel.
Anti foaming/cavitation additives are not up to the task.

Mobil 0/40 has more zinc than than thier conventional 5 and 10/30.

I can provide zinc/phosphorous PPM specs for all the mobil oils if you are interested.
Highest content is in thier racing 0/50.
Next, that wont kill your converter, is the 15/50. This is what I run.

Just my two cents.

Mobil 1 5w40 turbodiesel truck oil meets SAE SM as well as the diesel ratings.

[dnguyen1963]

So...Delvac 15W40 is designed for diesel engine? I think I will stick to Shell Rotella.

[tjts1]

So...Delvac 15W40 is designed for diesel engine? I think I will stick to Shell Rotella.

Delvac and Rotella both carry diesel and gasoline ratings. SM is a gasoline engine rating.

[E30RedtopSR]

Mobil 1 5w40 turbodiesel truck oil meets SAE SM as well as the diesel ratings.

I should of specified, I was referring to the aformentioned conventional 15/40 delvac and rotella products that were intially the topic of this conversation.

The 5/40 synthetic is great for higher mileage gas engines. I put it in old hondas and volkswagons at the shop that are consuming to much between changes.

[E30RedtopSR]

Delvac and Rotella both carry diesel and gasoline ratings. SM is a gasoline engine rating.

With varied results.
every engine is different.
That being said feel free to do your experimentation.
The oil manufacturer is free and clear should your experiment fail.

I'll stop here. This is what I am involved in for a living.
I discuss this stuff all day and have discussed it all at length with chemists, engineers and reps from Imperial Esso/Mobil.

Someone should chime in with regurgitated facts they read on the internet.
Listen to them. Really.

[stamar]

provide the zinc ratings for all the mobil oils thanks.\

any other oils as well. right now I have napa brand synthetic 15 50 what is the zinc in it?

[lennon]

https://www.bobistheoilguy.com

all the oil info/discussions you should need over there in the forums...

[stamar]

directly link me to the zinc sulfer ppm on bobistheoilguy havent been able to ever find it.