My GP I just bought has 85k miles on it. This will be my daily driver, about 100 miles a day. It's mainly highway miles and steady speeds. Yes, I know I can put Mobil 1 in it, but I'm saving that for my Imp. Should I put a partial synthetic or the high mileage oil? Also, what about the filter? High mileage, or just the standard filter?

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2004 Impala SS - ZZP PCM, 3.4" Pulley, K&N CAI, TOG Headers, SLP Cat-Back, 180* thermo, Autolite 605s, PRJ Performance wires, Alternator rewire, GMPP Handling kit
2000 Grand Prix GT, Commuter Car - K&N CAI, GMPP Handling kit, ZZP downpipe w/U-bend delete, ZZP Plog, Alternator rewire

While I tend to be opinionated about this subject because it is one I know fairly well I will just say this and let others post up.

Stay away from the partial synthetics or synthetic blends. Either use a petroleum oil or a full synthetic. Synthetic blends do not give you the best of both worlds and they are not 50/50 either. They charge you a premium price for a product you have no idea how much is synthetic and how much is petroleum.

So I say, as my contribution to this, stay away from the synthetic blends. Pick one or the other and see how your engine responds to it and go from there.

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Scotty Hall
Bartlesville, OK
2001 Pontiac Grand Prix GTP
It whines a lot, but I like it.

The only limitation you will ever face in life is yourself!

Some may say I am old school. But I use what works for me. I drive 100 miles a day for work. And that is if I go straight to work, and straight home. In my engine, I use Valvoline 10W30 (sometimes 5W30 in the winter), and an AC Delco oil filter. This costs me less than $15 for an oil change. I change mine every 3k miles. And it runs perfect. No problems at all.

My thoughts on this is the 3800 is not prone to oil related failures. They are a strong engine, and for the driver who doesn't drive their car hard, regular, cheap oil from Wal-mart works fine as long as it is changed regularly. Now if I was racing my car. Or a show car that didn't get driven very often. Or driving in extreme temps, I might think about synthetic. But regular oil is fine in my book, and has shown time and time again to work perfectly fine in our cars.

Our cars have bigger problems to worry about than what engine oil.

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1997 GTP - 200k+ miles, PEMs, 3" SS Exhaust w/ Borla Mufflers, 3.4", 180* stat(summer), FWI, 1.84 RR, PT, SLP hood, KYB GR2s, GMPP Handling Kit, etc...

On a previous '00 Impala SS I had, I regularly changed the oil or had a shop change it with standard oil, standard filter. The engine was fine when it was in an accident with 100k miles on it, so I know these are good engines. That's one of the major reasons I specifically looked for a GP GT. I just wanted to hear others thoughts and opinions and if it was worth it to do anything different for a "regular" driving car.

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2004 Impala SS - ZZP PCM, 3.4" Pulley, K&N CAI, TOG Headers, SLP Cat-Back, 180* thermo, Autolite 605s, PRJ Performance wires, Alternator rewire, GMPP Handling kit
2000 Grand Prix GT, Commuter Car - K&N CAI, GMPP Handling kit, ZZP downpipe w/U-bend delete, ZZP Plog, Alternator rewire

i have used Castrol GTX in all my cars.
Only time i ever ran mobil 1 was when it was 18 buxs at walmart
And every time no matter what oil. Ac delco pf47. Wish i could still find the ultra gold but still pf47 any time

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We can’t help ourselves. We see a line, we want to cross it. Maybe it’s the thrill for trading the familiar for the unfamliliar. A personal dare. The only problem is once you’ve crossed it’s almost impossible to go back. But if you do manage to make it back across that line you find safety in numbers.

Good point. I hear alot of people saying if the oil is changed regualry and at its proper time, it doesnt really matter what type you use. Im running Valvoline full sythenthic 5w30 right now fwiw.

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Peanut oil? High flash point for deep frying, so as long as I keep the car under 375* I should be good, right? Plus, if the car DOES catch fire, it'll smell nice.

I think I'll probably go with whatever is on sale that weekend at Walmart, or if the local car parts store does one of their "free filter with 5 quart purchase" I'll go with that.

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2004 Impala SS - ZZP PCM, 3.4" Pulley, K&N CAI, TOG Headers, SLP Cat-Back, 180* thermo, Autolite 605s, PRJ Performance wires, Alternator rewire, GMPP Handling kit
2000 Grand Prix GT, Commuter Car - K&N CAI, GMPP Handling kit, ZZP downpipe w/U-bend delete, ZZP Plog, Alternator rewire

When he said "Doesn't matter what kind" I think he meant "Doesn't matter what kind as long as it meet API current standards (SJ, SL, or SM)" FWIW.

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1997 GTP - 200k+ miles, PEMs, 3" SS Exhaust w/ Borla Mufflers, 3.4", 180* stat(summer), FWI, 1.84 RR, PT, SLP hood, KYB GR2s, GMPP Handling Kit, etc...

For regular oil I'd suggest mobil one clean 5000 I've ran that along with castrol gtx in my gp which is nearing 300k with no problems before i made the switch to full synthic. Just a word of advice from extra insurance u could run the ac delco filter with the part # pf52 its the same as the 47 but a longer filter which means a little more oil in the engine. We all know its better to be safe then sorry. But what ever you do stay away from fram filters. There a nightmare waiting to happen. Or if you can not get the delco filters here are the pureolator oil filter part numbers L10111 cross's to the delco pf47 and L24011 cross's to the delco pf52.

oil is like sodas, everyone has a favorite, and a least favorite, and all are right, and wrong

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Steve
'97 GTP VS cam, ZZP PCM, and not much else yet