Brian;
I wuold submit that from my experience 15w40 is an excellent oil to use in
your TR . Shell Rotella T is used by the majority of 18 wheelers in this
country. We sell a lot of Rotella and also Pennzoil 15w40 to diesel truck
owners of all creeds. I have used 15w40 in my Mazda Rx7 for years and
recommend it to all my customers for use in their Mercedes Benz, BMW,
Volkswagen , Porsche and Mazda engines. The owners manuals spec this
weight oil , right along with 20w50 if the ambient air temperature is warm
enough.
Either one is "just right" for your application. Think about the owner
of a Hudson Terraplane or '56 Packard or whatever. If the owner's manual
said to use a 30w Non-Detergent oil, would they be doing themselves any
favor by using today's modern 10w30 detergent oils? I think not. By the
way, I'm not really hung up on this issue, it's just what I do everyday.
Be Happy!
JMHO,
Jeff Johnson
At , Brian Sanborn wrote:
> >Ed Kollin, recommends using diesel engine oil in older >cars, in
> particular, CG-4 15W-40.
>
>John I have been done a similar path. I have been looking for " just
>right" oil for the TR4. 10W30 is too light for summer driving when the oil
>gets real hot and 20W50 seems a little too thick for the "brand-new"
>(newly rebuilt) engine in my car. I bought some 20W-40 Valvoline "long
>duty" by the case for this summer. The TR4 workshop manual calls out a
>20W40 as the right oil for summer out the UK.
>
>However, I also needed to find a high quality 15W40 for my VW Passat that,
>unlike the Japanese cars, uses a little oil between 5000 mile oil changes.
>
>I found this 15W40 product from Shell Oil called "Rostella" or something
>close to that. It is designed for and used by the diesel truck users and
>is "top" quality. It comes in 1 gallon jugs and is available from my
>local NAPA dealer.
>
>I have not tried it yet out of concern for whether it is a good choice for
>my TR4
>
>Brian Sanborn
>'62 TR4 CT16260L Groton,MA
>TR4 Website www.net1plus.com/users/sanborn/home.html
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