2 oil options

[beermak]

Hi, i can get for the same price mobil1 4t synth 15w50 or motul 5100 semi-synth 15w50.
Mobil its a group 3 hydrocracked and the motul i heard its almost a group 3 plus it has a blend with ester which might get it even better, actually using motul.
Should i switch or keep on with the motul? Opinions...




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[zombie]

I've been using Castrol Full Synth. for a long, long time. It never mattered what viscosity or tag line they put in/on the bottle.
As long as it is NOT dollar store oil, I don't think it makes a difference. I stay away from blends tho. They all leave residue. Especially on the piston/combustion chamber.