I too thought that diesel engines would be exempt from state emission
inspections, but I found out differently when I bought my Dodge with a
diesel engine. It required an inspection in Virginia and also in Florida
(my current residence). As you pointed out, the ash content is one of the
main differences in diesel engine oil. I don't know the consequences are if
you use diesel oil in an gas engine, but using oil designed for a diesel
engine will ruin the engine and negate the warranty! BTW, oil designed for
diesel engines is about the same cost, so why even bother? I've always used
Castrol in my LBGs with outstanding results! No sludge build-up, negligible
wear, great performance both on daily drivers and "special occasion"
drivers. I change every 3000k or 6 months and have never had an oil
problem.
Pete
-----Original Message-----
From: owner-triumphs@autox.team.net [mailto:owner-triumphs@autox.team.net]On
Behalf Of Fred Thomas
Sent: Wednesday, October 13, 1999 5:37 PM
To: Michael D. Porter; Philip E. Barnes@pop.mindspring.com
Cc: triumphs@autox.team.net
Subject: Re: oil note
Michael, diesel engines are exempt from most all state emmission
inspections, and which large H.D. trucks or cars (diesel) have a cat.
converter.
----- Original Message -----
From: Michael D. Porter <mporter@zianet.com>
To: Philip E. Barnes <peb3@cornell.edu>
Cc: <triumphs@autox.team.net>
Sent: Wednesday, October 13, 1999 2:24 PM
Subject: Re: oil note
>
> "Philip E. Barnes" wrote:
>
>
> > use. The response was to use a "heavy-duty" oil intended for diesels.
The
> > reasoning was these oils have more additives for anti-oxidation and
> > anti-corrosion than passenger car oils. The additives apparently have a
> > detrimental effect on catalytic converters, so have been reduced or
> > eliminated in "modern" oils. Made sense to me. Perhaps I'll go down to
the
> > local Kenworth dealer for my next oil change.
>
> Curious... since every heavy-duty on-road diesel engine today is
> equipped with a catalytic converter to meet emissions standards. I
> suspect that oil formulations for diesel engines have changed, as well.
> For what it's worth, we put Mobil Delvac 1200 in all engines, regardless
> of make, except for natural gas engines which require a lower ash
> content. Delvac 1200 is a 100% synthetic 15W-40, I believe. And we
> recommend oil changes every 6K miles....
>
> If you are looking for diesel engine oil with a pre-catalyst additive
> package, look for an oil which only meets CC or CD specs. Those are
> diesel standards which go back to the early `80s. They may simply not be
> available, though.
>
> Newest spec oils (up to CH-4 according to the Lubrizol site I use
> frequently) probably resemble an additive package more like current
> light automotive oils, so if you don't specify an older spec oil at that
> Kenworth dealer, you may get a fancy, quite expensive version of
> something you can buy at Pep Boys.
>
> Have look at this site. It will probably explain a _great deal_ more
> than the lubrication expert in Car & Driver:
>
>
http://www.lubrizol.com/referencelibrary/readyreference/6-OilClasses/Cclass.
htm
>
> It's fairly apparent from that page that classes CA through CE are now
> obsolete. CF through CH-4 are likely oils suitable for use with
> catalytic converters, since the ratings for each are referenced back to
> properties of now-obsolete classes.
>
> I highly recommend the Lubrizol site to everyone--there's a wealth of
> information there, freely available, on anything and everything having
> to do with lubrication.
>
> Cheers, Phil.
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