Since we still don’t know what type of car I think the best route is to do a hot oil flush, fill with 20w50 and at least one full bottle of Lucas additive.
If the car still makes noise add another full bottle of Lucas until all noise is gone.
I
redline claims their 10w40 retains a film similar to a 50 when hot. Not sure how accurate it is. But that’s why I’m hoping to use I for my application.
My bad, I’m new.
The smaller bike is better on fuel, cheaper on insurance, cheaper to buy, easy to store. Most scooters are designed to run at a fairly high engine speed and can do so without issue.
“Do not use oils of a diesel specification of “CD” or oils of a higher quality than specified.”
What a weird thing to say. What does “a higher quality” even mean?
This is from the owners manual of a 2016 Yamaha Zuma/BWS 125cc scooter. It goes on to warn against using energy conserving oils...