I use up a 18.9 liter pail of that Motomaster Semi-Syn 10W-30 Diesel Oil per year,
(regularly on special at 63$ CAD or so)
Didn't know it was a Citgo product, online searches I had done showed the exact same MSDS specs
as Rotella T5 but CT may have switched suppliers since.
Anyhow I've been running it in all my small engines:
- 9.5 HP snowblower
- 9HP or so / 5500W generator
- 6.5HP lawmmower
- 22HP lawn tractor (Kohler 7000 series engine)
- 30HP Honda CRF250X dirt bike (think off-road version of a 250cc 4-stroke motocross race bike)
and, even in my girlfriend's '06 Pontiac Vibe for the 'summer' OCI.
Can't vouch for this oil's cold cranking/pumping abilities as all the equipment listed
is stored in the above freezing ambiant temps of a heated garage.
Although no JASO rated like some other diesel oils to be wet clutch safe,
I've also had great results using it in the gearbox sumps of both my dirt bikes
with no signs of clutch slippage whatsoever.
Especially the YZ125 which was previously a notchy shifter,
and in which I had experimented many specialized motorcycle specific oils,
from thin to thick ATF type-F, 10W-40, 15W-40, 80W)
but switching it to this 10W-30 somehow cured all the shifting issues.
One thing I've noticed is that this oil doesn't darken much with use,
either the additives package is overkill for my low power applications or,
there isn't much cleaning and holding contaminants in suspension going on...