09-02-2019, 02:14 PM
I can at least confirm that 20W50 works fine in my engine, though it is a slightly modified (pressure fed) engine...
I did some measuring last autumn and found that at 10 degrees ambient it took an hour for my 6 pint sump to reach 65 degrees © or so, and it never got any higher. This is not really hot enough.
I did some measuring last autumn and found that at 10 degrees ambient it took an hour for my 6 pint sump to reach 65 degrees © or so, and it never got any higher. This is not really hot enough.