Originally Posted By: walterjay
I used Mobil 1 for a while and had a lot of engine noise, especially in cold weather. Switched to QSUD and it is amazingly quieter in my Asian engines. I guess it really depends on the engine. Still using Mobil 1-EP in my Ford Transit turbo.
I will 2nd the 'quieter' engine by changing over to QSUD 0w20 from M-1 0w20, especially in cold weather.....in my Ford Focus.
But.... I will be trying PP 5w20 next OC (great rebate)....and see if it makes any difference.