bj7 correct oil

[Roberte]

I have a bj7. I live in iowa where summer temperature averages between 70-90 degrees. What is the correct weight of oil to use? I have been told at auto parts store to use 10-40. Is this appropriate?

 

[TimK]

What is the condition of your engine? If it is freshly rebuilt with tight (on spec) clearances 10-40 would be fine. If it is well worn (100,000 miles) like mine, I use 20w-50.

 

[Keoke]

I would recommend a 30 weight racing oil like Valvoline VR1

 

[HealeyRick]

I would recommend a 30 weight racing oil like Valvoline VR1

Keoke makes a good point. In addition to correct weight you'll want to use an oil with sufficient ZDDP content like VR1 - See the discussion here: https://www.britishcarforum.com/bcf...ncorporated-Does-it-Work/page4&highlight=zddp

 

[DerekJ]

20/50 is what was recommended. I stick with Classic versions of that, such as Castrol, Millers, Penrite etc. Don't use the thinner, modern oils they are created for completely different engine types.

 

[British_Recovery]

Valvoline VR1 , 20w50 , Racing . It has everything needed as far as ZDDP, etc.
Bob