Thanks for the info! I might pick up some and give it a try... Hey, who has a discounted oil change if you bring your own?
In my 97 Grand Marquis with 101k miles I use M1 5W30 from Nov~Feb and M1 10w30 the rest of the year. I used to run it for 5k miles but in the last year or so I started changing it at 3k miles (right about 5k miles you could feel a lot of heat coming from the engine while standing next to the car)
I'm more interested in a new oil for my 98' Volvo S70 (93k miles). The dealership switched it to synthetic at around 60k miles and lately the car has developed a rough start noise that last for a minute or so. I believe the dealership uses 0w40 (Volvo brand?)
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Carlos