Why are you switching to 20w50 oil. Any problems with thinner oil's.
The typical thinking of our local ustadsss is hail jitna mota utna acha..... They are absolutely wrong.. Is the manufacturer mad who is providing you with specific API Grades and Viscosities for specific cars..
Just use the specific oil which the car manufacturer recommends.
At last there are too much fake copies of havoline in the market. If you want havoline then try some trusted dealer otherwise stay away from havoline.
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