[s-cars] Diesel oil?

[Jim Green]

On 3/5/06, Djdawson2 at aol.com <Djdawson2 at aol.com> wrote:
>
> You can safely run diesel oil... and I always do in my cars.  However,  I
> can
> only report on one engine where I used it for a very long time.  I  had an
> 86
> Scirocco that I bought in 89 with about 90k miles on it.  I  exclusively
> ran
> Shell Rotella T (15-40 mineral based oil) in that car.  I  actually sold
> that
> car to a friend, who owned it for 2 years running the same  oil.  Then I
> got
> the car back through a trade on another car.  I kept  it for about 2 more
> years, and again sold it after moving to CO... to another  friend.  When I
> lost
> contact with the car in 97, it had 260k on it... had  never been apart,
> not even
> for a valve job.  I would say the results speak  for themselves.
>
> Other things...  Diesels do not run hotter, in terms of coolant  temps.
> Diesel fuel does, however, put out more heat energy than  gasoline.  You
> can
> always expect a Diesel rated oil to have a greater  detergent load, and as
> a
> result, will keep the engine cleaner.  They are  also subjected to more
> extreme
> tests to get their ratings.  The S ratings  you see on the package are for
> gas
> spec, and the C ratings are for diesel  spec.  Typically, the higher the
> 2nd
> letter, the more extreme service the  oil will tolerate.  Bargain shoppers
> that
> find a case of oil at the K-Mart  for $10 can take a quick look at the
> cans, and
> typically find the oil rated for  SA or SB service.  If you are buying any
> such oil for any reason other than  changing oil in your air compressor,
> you're
> making a big mistake.
>
>
>
Check this out, I went to  Wallyworld to buy some "Truck and SUV"  M1.  I
walk up grab a couple of gallons and go to the checkout.  While in line I
realize the "Truck and SUV" I have in my hands is 10w30.  WTF?  I go back
and start comparing service certifications, it's no different than the
standard 10w30 syn M1 crap they have switched to.  I even went out to may
car and got a real qt of 5w40 that has all the C specs to make sure I wasn't
smoking crack.  Sure enough there is now a lesser "Truck and SUV" formula
out there, but I still don't see it on Mobil's site.  Hmm.

--
Jim Green
'89 90 GT35R quattro
'89 80q
http://www.mswanson.com/~jgreen/car_home.html