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MG MGA - What engine oil

I have recently had my engine overhauled, rebore,new pistons, crank ground, new bearings,rear oil seal etc, and wondered what oil to use. I have been told 10/40 semi synthetic is OK. What do you think?
Thanks
Nigel Munford

Just be sure it has a sufficent amount of ZDDP (zinc) in it or use an additive. Most modern oils are formulated without it because newer cars have roller cam followers (less load than flat tappets) and ZDDP is bad for catalytic converters.
Cheers,
GTF
G T Foster

I used a straight 20/50 during the running period before going for a semi synthetic. This allowed all the rubbing bits to bed in before coating them with the slippery stuff.

Steve
Steve Gyles

and don't use zddp during the running in time
dominic clancy

This thread was discussed on 06/03/2013

MG MGA index

This thread is from the archive. The Live MG MGA BBS is active now.