DIYbanter - View Single Post

In article ,
says...

SG is fine. It won't last as long, and it's probably made from
recycled oil rather than fresh synthesis, but it's a perfectly good
lubricant.

The problem is that it doesn't meet emissions regs for California,
where type approval (not even the annual inspection) tests a few more
emissions than we usually do here. This is mainly due to unrefined
recycled crap, rather than the SG rating itself. As such, a blanket
ruling is simplest for the oil companies. 10-30W SG must be a few
years old though ? I've only seen it as 20-50W recently, sold for
oil-burners with no rings or valve guides.

I don't know how old it is. It came with the house! I have various drums
and containers of oil, the SG, some chainsaw oil, some diesel engine
oil. The latter is the only one I know I can use, in the diesel
generators. The chainsaw oil can be used on bicycle chains though
opinion is divided on its usefulness. The previous occupants had older
cars/motorbikes and so they may have used the SG on that though it is in
the generator shed rather than the garage.

In '97 I was looking for SJ rated oils and simply couldn't find them
anywhere. In the end I found one dealer in the whole city who knew
what I was talking about, knew that the S* rating system went beyond
SH and stocked some (Valvoline). Now you can hardly buy anything of
lower grade than SI, unless you go to Wayne's Escort Emporium in
pikeyville.

Now, the one thing I have learnt is that category SI doesn't exist, they
(the SAE) went straight from SH to SJ to avoid any confusion with the SI
of SI units.

I wouldn't use it in a turbo though, because of the coking problems.

Thanks.

Colin