http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_761759_-1_10461
how do you guys think this oil would work out?
low detergents
high zinc value
and its regular motor oil not for diesels.

not street legal..but probably for emitions and smog laws.
but these old cars dont matter when it comes to those.

what's the big deal about not running diesel oil or detergents? :confused:

diesel oil is rated for use in automobiles ( read the label ) and the detergents help to prevent that dark brown build up. AND diesel oil is rated for 'on road' use.

ive always heard bad news about diesel in old cars.
think this is just people with messed up cars to begin with?

ive always heard bad news about diesel in old cars.
think this is just people with messed up cars to begin with?


we've ( my father and i ) have been using Shell Rotella 15w-40 for over 15 years in vehicles ranging from a v6 Ford Probe ( Mazda engine, both street and circle track ), 350 SBC 1/2 ton pickup, SBF 1/2 ton pickup, Toyota and Geo/Suzuki street cars, Toyota pickup and Buick 455 and 350 and SBC on the circle track.

i think you can safely say that we've given it hard enough use that if there was a problem with the oil, we'd have found it.

now, if you've got problems with cylinder blow by, diesel oil additives (zinc, high sulfur content, etc) might mess up your cat or O2 sensors. but that's not really a problem with the oil, it's a problem with your previous lack of maintenance on the vehicle. and that would also take a while to do damage.

The Zinc is coming out of Rotella, too. Even GM's EOS doesn't help any more.

I heard that someone is coming out with a zddp additive, and I'm definately gonna be checking that out.

By its description, I don't see anything wrong with that oil, but I am curious to know what makes it illegal for street use. Is it just the zinc levels? Dunno. I thought ZDDP was bad for cat's but I didn't think that made it illegal.

-Bob C.

The Zinc is coming out of Rotella, too.

"reduced" NOT "removed". all diesel oils are reducing their zinc content because EPA specs require new diesel engines to run catalytic convertors. something is better than nothing.

I wrote to Shell, here is their answer.

Clifford, there has been no reduction of zinc in the straight weight
Rotella oils such as Rotella T 30. There has been a slight reduction in
zinc for the multigrade Rotella T oils in order to meets the new API
CJ-4 specification. Rotella T 30 should still work well in your antique
Buicks.

Thank you for your interest in Shell products.

Richard Moore
Staff Engineer
Shell Global Solutions (US) Inc.
Westhollow Technology Center, PO Box 4327, Houston, TX 77210, United
States of America
1-800-231-6950

-----Original Message-----
From: alglen@comcast.net (alglen@comcast.net) [mailto:alglen@comcast.net]
Sent: Monday, August 27, 2007 9:10 AM
To: askshell, SLUBE-GSMR/5
Subject: Rotella Ask Our Expert: Oil Analysis


------------------------------------------------
ROTELLA.com E-mail Form
------------------------------------------------
NAME Clifford Herold
E-MAIL ADDRESS alglen@comcast.net (alglen@comcast.net)
SUBJECT Oil Analysis
COMMENTS
----------------------------------------------
I have been using Rotella 30 for Years in my antique Buicks. I
understand the latest version of Rotella has dramatically reduced the
amount of zinc. The overhead valve engine with non rollers valve
mechanism theoretically needs the zinc for the sliding friction. What
has happened to Rotella? Can I continue to use it in my antique
engines, or should I find another oil made just for the antiques with
zinc added?

thanks for the updated info on the shell rotella oil, I had concerns about finding an additive for the old riv.

Hello!
I heard... That if you use diesel engine oil in old cars with clogged up engines, the oil will solv all the old "clog" (sorry. I actually dont know what it´s called in english!)
And it gonna fill you oil filter in no time!
Have no idea if this is true!

Once in a Buick servjuce garage, I noticed the only oil additive GM recommended--it was a GM formulation of a zinc-containing oil.

I've been told this is what makes Shell Rotellaa "good motor oil when I a worked at a Shell gas station for 4 years in high school.

I have no objective proof, but I do religiously change oil every 2-3 months with 100% synthetic (5W-30 with the API certification) and may be a quart of Rotella once a year.

My '63 engine ran for over 250,000 miles until the last rebuild. That was 1988. It still runs strong.

Changing oil/filter segularly is cheap insurance when faced with rebuilding vintage engines with scarce parts.

Synthetic isn't that expensive. I got some at NAPA yesterday for $3.39/qt.

Synthetic definitely have less voilatility and greater resistance to viscosity break down, and higher shear forces.

Reistance tests vam be written to produce any resuly you want.the ball bearing wear on metal (analogous to a cylinder wall) seems to indicate less wear.But even that test isn't real world.

there's a lot of hype, but I still use synthetics

the oil will solv

"dissolve" is the english term. i'm reading you loud and clear though, no worries. :thumbsup:



I heard... That if you use diesel engine oil in old cars with clogged up engines, the oil will solv all the old "clog"
And it gonna fill you oil filter in no time!

if your engine is that full of crud it really need to be torn down and given a good chemical bath.

if you're going to try to get by with just 'flushing' the block, yeah sure, you need to change your filter early. probably at least 3 times in 6000 miles. i'd consider using something in addition to the diesel oil while i was at it. Seafoam or Marvel Mystery Oil or something.

Haha! Thank you for the English lesson! I learn more and more here. every day!

I have always run diesel oil, 15-40 in all my cars, and diesels too of course.:)

I would even use it as a replacement if I purchased a car. If the engine has so much sludge build up that the diesel oil creates a problem, then it was time for that motor to come apart for a clean up anyway..:jeez:

im gonna go with bob k's advice. oil change due up for this weekend or so.
will go with rotella and see how it rides.

:thumbsup: