2002 ss first 3800 ive owned whats your oil prefance live in cold weather 5-30? Convetional or syn? Brands also have 143,000 use high milage? Thanks from kansas also ive always used wix filters in all my cars.thanks from heartbeat.

 

I use the Mobil Clean 5000 5w-30.

 

I use reg Mobile 1 5w30 for the 05 SS. I'm running conventional oil in the 03 10w30

 

I use Valvoline 5/30 synthetic in my '03 3800.

I know that a lot of people use Mobil synthetic oil, but here's a true story that steered me away from it. Back in the 80s I was working as a fleet mechanic for a taxi cab company. We made the transition to synthetic oil in a couple of the cars and used Mobil 1. Within a month both cars had engine failures due to lack of lubrication. When the first engine failed we didn't think much of it, but when the second engine failed we began to wonder why. When the oil pans were removed from both engines the oil in them had literally thickened up and had the consistancy of pudding! A Mobil rep hauled both engines away and my boss was (eventually) reimbursed for the cost of new engines but after that Mobil products went to the top of my 'do not use' list. Yes, that was years ago and the formula for their oil has changed many times sice then, but I just can't bring myself to trust their products.

 

I use Mobil 1 fully synthetic, 10w 30.

 

I use conventional oil in all my fleet. I use the manufacturer's recommended weight. I tend to stick towards well known names (Quaker State, Valvoline, Castrol) in my cars.

Never had an oil related problem. Change between 3,000-5,000 miles. My '94 Grand Am has over 210,000 miles and is running great for it's age/mileage.

 

mobil 1 full synthetic.

 

Castrol Edge w/ Syntec. My engine calls for 5w-30, I can run 10w-30 according to the owners manual - but only if it's warm enough.

 

I use mobil 1 full syn in my cars

 

I've run Castrol Edge synthetic almost exclusively since day-one in our '02. I think I started with 5W30 but switched to 10W30 at some point. Oil changes between 4K - 5K miles. 158K on our engine and still going strong.