MTR

On my post about Halfords oil, someone asked about Shell oil.
I e-mailed them and have recieved this response.

Good morning Martin

Shell Helix Ultra 5W/40 is a grade 3 synthetic oil. Group 4 contains PAO. Hope this helps.

If there is anything else you require please contact the Customer Service Centre.

Regards

********
Customer Service Lubricants Advisor
Business & Technical Team
Shell U.K. Oil Products

End of quote:

And for interest its £32.99 for 5 litres.

So Halfords is classIII
Comma is Class III
Millers XFS is class III
and Shell Helix Ultra is class III.

There must be an awful lot of cars driving about with this oil in them.
Presumably not seizing up all the time.

And to clarify they are hydrocracked mineral oil not cooking oil as some people seem to think!!! as thats vegtable based much like Castrol R racing oil.

Cheers
MTR