Engine oil

If money is not an issue for you I'd stick with the V2. It's got gobs of ZDDP and is MA certified. Shell Rotella is decent oil for sure, but it doesn't have as much ZDDP as the V2.

BTW, I've been reading a fair bit on Bob Is The Oil guy and despite the lower ZDDP levels in todays oils most Oil Analysis Reports come out good. To me this is the bottom line; the oil analysis test will measure how much metal there is in the oil from wear. Low metal means the oil is doing it's job.

Generally speaking, I'm a believer in diesel oil for motorcycles over dedicated motorcycle oil, mostly because I'm a cheapskate. But that V2 oil is much better than your typical motorcycle oil. A lot of high end bike oils have ZDDP levels under 1000 now, but the Brad Penn is something like 1500. Don't think I'd use that Penn oil in a bike with a catalyst though.

BTW, another oil that seems to come up golden on BITOG is Mystik JT8 15W-50. It's a diesel oil with lots of ZDDP and a great price. Two gallon jugs go for about $25 at places like Farm and Fleet.
www.farmandfleet.com/products/g--1567-my...duty-diesel-oil.html

By joehooper: Castro GTX 20W-50 still had ZDDP in it when I researched this back in 2011.

After looking thru a bunch of recent msds documents from their website (dated 2016-2017),
the only product I saw that listed ZDDP was their GTX diesel engine oil.

A couple of their motorcycle oils have a zinc-phosphate compound that's probably similar to zddp.
Some of their motorcycle oils did not list a zinc-phosphate in the ingredients.

There don't seem to be any conventional GTX oils with zinc-phosphate. All of the Castrol oils I saw have "proprietary performance additives", but there's no telling exactly what those additives are. note: I only looked at 10W-40 & 20W-50 oils.

According to this letter dated April 17.2007
www.ahcso.com/pdf/response_to_zddp_article_from_castrol.pdf

martin_csr wrote: By joehooper: Castro GTX 20W-50 still had ZDDP in it when I researched this back in 2011.

After looking thru a bunch of recent msds documents from their website (dated 2016-2017),
the only product I saw that listed ZDDP was their GTX diesel engine oil.

A couple of their motorcycle oils have a zinc-phosphate compound that's probably similar to zddp.
Some of their motorcycle oils did not list a zinc-phosphate in the ingredients.

There don't seem to be any conventional GTX oils with zinc-phosphate. All of the Castrol oils I saw have "proprietary performance additives", but there's no telling exactly what those additives are. note: I only looked at 10W-40 & 20W-50 oils.

ZDDP refers to Zinc dithiophosphate. In other words, Zinc & Phosphorus. All oils have these compounds, it's just a matter of how much.

ZDDP = zinc dialkyldithioposphate compounds.
After doing a little more checking, the other zinc phosphate castrol lists in some of their oils is also classified as ZDDP.