Originally Posted by Sniper 78227

i use Castrol gtx high mileage 10w 40 because i live i texas, and the temp. get up in the low hundreds. and my blazer has 199234 miles

Originally Posted by ComputerNerdBD

I always make the oil change place put 10W-30 oil no matter where I go. I also have it changed every 2500-3000 miles. In fact, if I am home for the weekend from college and it is close to 2500 miles since the last oil change, I get it changed anyway.
It would go to 60 PSI on startup, 45-50 during cruise at 65 MPH and down to 30-40 (sometimes 25) on idle at operating temp. At the last oil change 700 miles ago, I had them put Lucas Oil stabilizer in it. I noticed my cruise and idle oil pressures go up by 10 PSI. They also said there was alot of moisture on the pan and that the oil pan gasket must be leaking. I parked it on my mom's new garage floor and she was pissed when I pulled it out and my front tires lifted the paint and there were 2 drops of oil on the fresh paint!!!

With 5W-30, it would go down to 20 on idle when it is hot, so I always tell them to put in 10W-30 and if they put up an arguement (like when I had the coolant flushed they argued with me about putting the green stuff in. They put Dexcool in anyway. Never went back there.) I tell them to move the car out of the bay and that I am leaving.