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Hello, I came across this forum post that claims you can just add a bit of F-type ATF to a GM transmission to firm up shifts. It is claimed by some that no extra wear and tear will be added to the transmission. What do you guys think of this? I figure the firmer shifts would lengthen the life...

Hello, Is Mobil Super 2000 the same as Mobil 1 High Mileage? I would like to try out Mobil 1 HM because of the praise it seems to get but the oil is unavailable in Canada.

Hello, I have a car that I have parked while I sell a second one. I start the car once a week and get the engine to operating temperature to help reduce deterioration. The car is parked on a slope so I was wondering if it's harder for oil to reach the valves that are on the higher side of the...

Hello, My car sat without being driven for about a year, but I would start it up once every few weeks to keep the engine seals from drying out. Recently, I got the car on the road, but the transmission seems to be slipping a little in all gears. The fluid was about a litre low due to some...