Car expert reveals cheap additive 'mechanics don't want you to know'
Top car mechanic Scotty Kilmer has opened up on the one affordable additive that garages "don't want” drivers to know about.
Cars9y
Rear Main Seal
The rear main seal keeps oil sealed inside the rear ... In some cases, that can stop or slow leaks. Other drivers may switch to a heavier oil, such as 10W30 instead of 5W20. Mechanics frequently ...