Spider1,quick answer to that is wallys house brand used to be shell.Now that was a few years back and who knows anymore.I just use it for flushing out an engine now an then along with a fram filter.Once thats done the good stuff goes in along with a good filter.We all know what we "flush" and thats what I use it for.I guess that makes fram the tp

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83 B-150 slant 6,4 speed. 79 B-300 360 pathfinder 4x4. 74 W-300 318 4x4 git-r-done 80 B-100 sl6,4speed

He has also a 1959 Chev (Impala?), factory RHD with factory green Connolly leather interior. Some other interesting RHD Mopars, too, besides the Charger.
Myeaaah, you needn't go to any special effort to get oil for this car. It's really not crucial that you get 10w-30. That happens to be the most common grade in the North American market. The 15w-40 will be just fine. Slant-6s have run on cooking oil...you can ask Doc(tor Dodge) about that one!
Scamsoil/Spamsoil
Unnecessarily good and unnecessarily expensive for the application
Never heard of this brand over here.
Motul auto chemistry is sold over here through small specialist distributors, and marketed as ultrahigh-quality exotic exclusive fancy-schmancy fine European stuff...

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Aero engine oils are relatively (in some cases VERY) low-detergent compared to automotive oils. Two reasons: One, a lot of older aero engines use very soft/embeddable bearings because they use screens instead of fine oil filters (better to let the oil get dirty than to plug a filter and lose all oiling) and some detergents practically dissolve such bearings. Two, "ash" (combustion chamber deposit) formation is a bigger issue with airplane engines that run WOT but relatively low RPM most of the time, and detergents promote ash, so rather than risk fouling plugs at 15,000 feet they run less detergent. Not good for a car engine.

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So pardon my ignorance here: 15W-40 can be used but go for the diesel engine variant?

The only oil I buy is 5W-30 for my van and 20W-50 for my old Fords!

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The rules are there are no rules!

At least over here, you won't find a "diesel version" 15w40 separate from a regular or "petrol version". The 15w40 oil we get from the various makers -- I just this afternoon bought five quarts for the 318 in my truck -- is diesel-certified and specifically recommended by certain diesel engine makers, but it also carries all the certifications and approvals for use in gasoline engines. You shouldn't have any trouble going in the nearest Halford's or whatever and picking up five litres of a reputable-brand 15w40.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Reminds me of the advice they use to give for early Volkswagen engines, to not use modern detergent oils due to the lack of a filtering system.

I have found 15W40 "C" vs "S" grade oils to be safe in 99% of internal combustion engines (except oil-mix applications), 2nd choice would be a mil-spec straight 30 wt. Enjoy!

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Calvin
Clinton, SC