Re: Aurelia - which engine oil
Posted: 15 Oct 2016, 16:26
I use Castrol 10W50 in my cars, which I believe is a semi-synthetic oil. I had heard pure synthetics are for more contemporary cars, with tight tolerances, although some disagree. Some even go so far as use the old Penn-rite oil, which I think is pure mineral, with zinc or use an additive to protect the valve seats, but luckily I have no had issues.
For the front suspension and rear trans, non-synthetic oil, straigthweight (not multi-grade) oil. For the trans, make sure its non-EP, but straight 90 oil, for the synchros need the resistance of the older oil to work.
Also important is the filtration - I replaced the mesh filter on my B20 with a full flow spin on paper filter (you can get bolt-on adapters), and upgraded the oil pump to deal with that. If you plan to use your older Aurelia a lot, its something to think about. Also changed from babbitt to shell bearings.
Please check this info locally with folks you trust. These are general thoughts only.
For the front suspension and rear trans, non-synthetic oil, straigthweight (not multi-grade) oil. For the trans, make sure its non-EP, but straight 90 oil, for the synchros need the resistance of the older oil to work.
Also important is the filtration - I replaced the mesh filter on my B20 with a full flow spin on paper filter (you can get bolt-on adapters), and upgraded the oil pump to deal with that. If you plan to use your older Aurelia a lot, its something to think about. Also changed from babbitt to shell bearings.
Please check this info locally with folks you trust. These are general thoughts only.