To break the ice. When i got my oil changed last, they told me i should put some "High mileage oil" in there. It costed more but i was told i didnt have to put it in everytime. Was it worth it?
My Monte has around 135k Miles on it and its running fine so far.

 

I have 132000, Ya it will help I think.. But I would recommend switching over to Full synthetic oil.. Lasts longer and help engine out better.

I run RED LION Full Synthetic and its by far the best oil ive used.

 

Over 160k miles on my Monte. I use Mobil 1 fully synthetic oil. However, Shawn Mayes on clubgp with a top swap on his GP GT did oil changes with the cheapest Walmart oil he could find. He put down over 380whp and had over 260k miles on his Grand Prix before he snapped a rod. So, to me the "high mileage" oil doesn't seem worth it.

 

I have a little over 138,000 and I use Mobile 1

 

I'm a Royal Purple man myself. I'd consider using Mobil 1 as well though. I'm getting close to 117,000 miles. The high mileage oil is usually just a slightly thicker oil. Those old tolerances aren't as tight as they used to be, and the thicker oil doesn't slide through the cracks like it used to. Keep an eye on things basically. Crawl under your car and have a look at it sometimes. Take that little cover off between the oil pan and the tranny and have a look at that rear main seal, get your transmission serviced, change your plugs, wires and ignition coil when you should.... keep an ear out for little things. Wash and wax the car. Listen for anything that sounds off and figure out what it is. One time I thought I heard water sloshing... figured out the drain holes in the bottom of my passenger side door were jammed up... I bet there was 2 gallons of water in there. I probably saved my door from rusting. Little stuff like that can go a long way.

 

196k on mine, but my engine only has about 16k on it. So I don't really fit into this category I guess.

 

228,xxx on mine. Change oil every time the C.O.L. comes on or every 3k miles. Mine doesn't have O/D, so the car runs the interstate at 3500 rpm@ 75mph. Driven to and from indiana (300 miles one way) a few times like this... crummy gas mileage, but all else well.

Also, I have an external trans cooler on it. The engine runs cooler and the trans shifts a bit quicker. I think it helps a lot with the reliability.

I also change the fuel filter and spark plugs once a year. I know the plugs are a bit too often, but they're cheap and it doesn't hurt to spend time with the car now and then. It let's you know you love it.

 

 

163,000 ish miles on mine, only thing i've done is a basic tune up and changed the oil to mobil 1full synthetic scince my grandfather gave me 2 cases of it. 2nd oil change i did the "old" synthetic oil looked like it coulda ran another 5k miles, now im sold for life