Just bought a 01 Bonneville with 209000 miles runs good but my oil pressure gauge goes max when I start the car going to replace oil pressure sensor ,filter and oil wondering what oil to use

Jeremy Hall

Asked by Aug 18, 2015 at 04:12 AM about the 2001 Pontiac Bonneville SE

Question type: Maintenance & Repair

No clue what oil is in it but it's low. Also flushing
radiator has dex cool in it. Should I switch, if so to
what coolant?


4 Answers


They recommend 5w30 weight oil, witch I like running in the cold weather, in the heat I like 10w30 weight. Also keep with the dex coolant. That is what it came from the factory.

1 out of 1 people think this is helpful.

On a cold engine that could be normal. My '03 S- 10 Pick Up with 286,000 miles on it sometimes does that, especially in the winter. Then once it warms up the gauge dropps back to normal. When flushing the cooling system just use plain water. No chemical cleaners unless it's running hot or overheating. On an older model something's bound to spring a leak if you use a chemical cleaner. HTH. -Jim


Better to read high than low. I agree with Js08016, if it drops back to normal after the engine gets up to temp - leave it be. Good idea to drain and change oil and see what happens to it with proper viscosity and fill level.

1 out of 1 people think this is helpful.

Have a 2000 SSEi with 199k. Have used Mobile1 synthetic since day one. 5w30 year round. Engine is like new, inside. Never too late to start, eh?

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