Have an '82 BMW 733i (E23) with the vaunted M30 engine running on L-Jet so it's an early version of the E23. I'm needing to change the oil because I picked it up as a project that wasn't running and there was a ton of troubleshooting that probably resulted in a good amount of fuel getting in to the sump. Everything runs fairly well now and I think it's time for fresh oil. BMW of course shows to run 20W50 in the climate that I'm in--Coastal Bend of South Texas-- which mean high heat, high humidity in summer time, and occasional freezes in the winter, say around mid to high 20s.
I'd prefer to stick to oils available OTC from Walmart unless there's an overwhelming reason to use something else. The oils available at my Walmart that I'm considering are Supertech 20W50 Conventional, Castrol GTX 20W50, Mobil Delvac 15W40, and Rotella T4 15W40. I don't feel a terrible need for using an HDEO being that my engine is low mileage and really clean inside, but I'm not opposed to it.
Out of these, which would you all use in a clean, not terribly leaky M30? Any other oils that I should be considering? Perhaps Valvoline VR1 which I can also get locally at AZ or Oreilly? Would prefer to stick with a conventional as I don't feel a need for a synthetic in this application given how I'll be using it though.
I'd prefer to stick to oils available OTC from Walmart unless there's an overwhelming reason to use something else. The oils available at my Walmart that I'm considering are Supertech 20W50 Conventional, Castrol GTX 20W50, Mobil Delvac 15W40, and Rotella T4 15W40. I don't feel a terrible need for using an HDEO being that my engine is low mileage and really clean inside, but I'm not opposed to it.
Out of these, which would you all use in a clean, not terribly leaky M30? Any other oils that I should be considering? Perhaps Valvoline VR1 which I can also get locally at AZ or Oreilly? Would prefer to stick with a conventional as I don't feel a need for a synthetic in this application given how I'll be using it though.