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yeh ive used penrite 10w-50 from 50000km....its a gud weight...wat u mean by increased engine lag?
my car used to run like ****!
coz the dodgy mechanic i was seeing was using a no name brand of 25W-40 oil, back when i knew nothing about cars. it used to burn and my car felt sluggish all the time!
so using thicker oil in my old engine be more wise or should i just stick 2 the maganatec plus i dont warm up my car in the morning so thats basically y i got the magnatec in the first place cause apparently your car doesnt need warming up LOL but who knows how true that is