Should you use thicker oil in an older engine?
This is a practical method to improve oil pressure in an older, high-mileage engine.
The slightly thicker oil film from the heavier base weight oil — 10W — can help protect worn engine bearings as well..
Should you use synthetic oil in older engines?
The synthetic oil could leak out and the vehicle could burn or lose oil. … It’s not accurate to say that you should never use a synthetic oil in an older car. If the car has been maintained and is in excellent running condition, the synthetic oil may protect the vehicle and prolong its life.
Which synthetic oil is best for high mileage?
Pennzoil Platinum High Mileage Full Synthetic Motor Oil. … Castrol EDGE High Mileage Full Synthetic Motor Oil. Valvoline Full Synthetic High Mileage Motor Oil. Royal Purple HMX High Mileage Synthetic Motor Oil. Shell Rotella T6 Full Synthetic Diesel Engine Oil. Mag 1 Full Synthetic Motor Oil.More items…•
What is the best engine oil for high mileage?
The Best High Mileage OilValvoline High Mileage Motor Oil. … Castrol GTX High Mileage Synthetic Motor Oil. … Mobil 1 High Mileage 5W-30 Motor Oil. … Pennzoil High Mileage Oil. … Castrol High Mileage Advanced Full Synthetic Motor Oil. … Royal Purple High-Mileage Synthetic Motor Oil. … AmazonBasics High Mileage Motor Oil. … Mobil 1 High Mileage 5W-20 Motor Oil.
Which oil is thicker 5w30 or 10w30?
10w30 is thicker then 5w30 because it has a higher viscosity in low temperatures. The engine oil will flow slower than 5w30 during the cold season. Thicker or higher viscosity metal oil has a better seal compared to low viscosity oil.