Re: 0W 30 over 0W 40 – brief road trips?
Posted: Mon Feb 23, 2026 11:29 am
The oil formulator has painstakingly balanced the oil additives; trying to guess what they are is not a good idea. There is no guarantee that more of something would be beneficial. In the case of oil, for instance, increasing the concentration of specific anti-wear compounds has the opposite effect of improving performance.