Your reply leaves a lot to be desired. GM called for 30W in this engine. Some say that 10W30 is too thin in hot weather, like we have in Texas for 5 months a year, for this motor. I need to know definitively if I can use 10W30 in this motor, without any problems or repercussions, year round. Please advise.
Aslo, you should have elaborated on why you use 20W50 and what motor you use it in.
Sunday, April 3rd, 2011 AT 5:17 PM