- My Experiences with Amsoil


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1948 Hercules gas 6 cyl. industrial engine on my 400 Amp Lincoln Arc Welder.

1948 Hercules gas 6 cyl. industrial engine on my 105 CFM Worthington air compressor.

I was VERY reluctant to put it in either of these and didn't for several years. Then one winter I had to use both at 40 below zero working on frozen pipes for a town in Maine. Couldn't get the blasted things to start and they were both sucking gas with much use. Finally enven though both were leaking and old, I flushed and changed to Amsoil. The leaks in both stopped within a few hours. The fule consumption dropped over a gallon every 2 hours. No longer had to jump start them or use the tank heaters, just push the starter button, purring nicely after one crank. I kicked myself for not changing them sooner.

I changed the Amsoil every 25,000 miles in everything below except the diesels which I did at 10,000 miles do to sulfur in fuel and a couple of the gas ones that I used the bypass filter on.

1972 Dodge van with a 360 and 727. Bought it with just over 90,000 miles on it. Converted everything to Amsoil. Went from 18 MPG to 21 MPG. Put on the bypass filter. Oil analysis said to change the filters sometimes at 15,000 miles, sometimes at 30,000 miles. Didn't have to change the oil until at 255,000 miles got a bad test back. The report showed high fuel dilution and recommended checking the carb, ignition system, etc. Had to rebuild carb and change oil. Put almost 300,000 miles on it before trading. About 5 years ago I saw it at a gas station. Still running fine with Amsoil in it, but speedo broken so the owner didn't know mileage.

1972 Datsun 240Z. Converted it at about 30,000 miles. Raced it in Autocross and put over 150,000 miles on it before trading it for a Chevy truck. Sold the truck a few weeks later and didn't get around to changing it to Amsoil.

1973 Datsun Pickup. This was the first one I tried Amsoil in. Converted at 31,000 miles, right after pulling the head to replace an exhaust valve and seat that were killed by a screw from the carburator. WHen I had it apart, there was a yellow coating of varnish from the petroleum oil I had been changing every 3000 miles. Had been changing the gear oil in the tranny and rear every 10,000 miles. Saw "normal" metal filings on the magnet on the tranny drain plug every time. After switching to Amsoil ran it over 150,000 miles before the body rusted out. Pulled the head to check it out before getting rid of it. Looked and measured the same as it had at 31,000 miles. No more film of varnish. Just nice clean metal. I did oil analysis tests every 3000 miles as I didn't believe in the long drain intervals. Had tested the petroleum oil at 3000 miles before converting. The Amsoil at 25,000 miles had less wear materials in it than the petroleum at 3000 miles. According to the analysis results I really didn't have to change it, but since Amsoil was guranteeing it for 25,000 I dumped it.

1973 Grumman motorhome (picture here) with 392 International engine, also in the Chrysler 727 tranny in it, the rear end, power steering, and the air filter. Just returned from a trip to Texas with this one. Going for a ride with it this weekend. Had 42,000 miles on it when I got it and converted it to Amsoil. Fuel economy went from 6 MPG to 9 MPG. (At 70 MPH). Starts easier. I put the bypass filter in it and do oil analysis. Tests still show oil ok after 7 years, but only about 20,000 miles. While going through Houston Texas in December 1996 one of the fittings on the line to the bypass filter started leaking onto the exhaust. Made quite a cloud behind which fortunately I noticed. Pulled off and disconnected the line and plugged it. Will replace with proper braided steel lines this spring.

1975 Chevy step van, 11,000 GVW. I bought this from the US Post Office cheap as is was one of the Chevy 350s with soft cams. Put a TRW cam in it and a double roller timing chain, converted to Amsoil. This is what I used for deliveries of Amsoil and to go to swap meets with before I got the motor home. The rear end was geared for New York City where the thing came from, so at 70 it was screaming. It went to Florida, moved tons of blacksmith equipment, tons of Amsoil. Last weekend I traded it for a 1962 Ford Fairlane 500 with a 292. Will convert it to Amsoil shortly.

1976 Cadillac, This had been a short trip car before I got it. Had only 30,000 approx miles on it. Was FULL of sludge. Flushed it with Amsoil Engine flush and put petroleum oil back in with an Amsoil filter on it and a quart of Amsoil engine oil for a slow flush. Flushed it again after 2000 miles. Repeated this 3 times before it was clean enough to put Amsoil in. Only kept it for a year. Fuel economy with Amsoil in a 454 engine (Sedan DeVille), 24 MPG.

1979 Datsun 310GX. Bought new and converted immediately except engine waited 6000 miles. That was before they had pre-lapped and radiused rings. Have you ever been to a Sealed Power Corporation seminar? A LOT to learn about rings and such. From what I understand, most if not all ring manufacturers are now licensed to use their technology so breal in is no longer needed. Anyway, put over 200,000 miles on this one. Drove it once for 4 hours at 70 MPH on a hot summer day with no water on it, at 42,000 miles. No damage except for the head gasket that caused the water loss. I had a VW trained VW and Dodge trained Dodge mechanic in the car with me. He's now a heavy equipment mechanic at the Portsmouth Naval Ship Yard. He as well as we was very skeptical. Has been a dealer now since 1980 with many interesting results. Put over 250,000 on this car.

1980 VW Rabbit Diesel. I just traded and got this last year and converted it, had over 120,000 miles on it.

1982 VW Rabbit Gas engine. Bought this in Texas for $450 because the idiot "mechanic" a car dealer had couldn't get it running. An hour after I got it, it was running. (Took so long as it was 30 minutes towing it home). Drove it a week on the old dino oil. Was a DOG. Had 126,000 miles on it. Converted everything to Amsoil with 0-W30 in the engine. Could now smoke the tires off in first and get quite a bit in second. At 10 MPH in first you can just tromp on the gas without touching the clutch or brake and start burning. It's helped me sell a lot of Amsoil Series 2000 0-W30!

1983 Ford LTD II Wagon with a straight 6. This had 98,000 miles when I bought it. Converted immediately. Put 235,000 miles on it before the body fell apart. Drove over 250 miles a day with it through some of the worst areas of New Hampshire. Commuting to a Job at General Electric Jet engine shop I worked in.

Yes.... Jet engines... I know a little about them too. Any idea how often they change the synthetic oil in them??? NEVER! Not unless an oil analysis shows contamination. A jet engine can't run on petroleum oil anyway. Too high a bearing load for the film strength. Too hot at the rear, and if you ever somehow managed to get to 30,000 feet petroleum oil would be frozen solit at the front.

Oh, BTW, the founder of Amsoil was a lubrication engineer in the Air Force and a fighter pilot.

I was a precision Measurement Equipment Lab Technician in the USAF, before that worked on the flightline. Dumped many gallons of synthetic oil in jet engines before ever hearing of the stuff for cars.

1987 VW Jetta Turbo-Diesel, Had 51,000 miles on it when I got it and converted it. Has over 246,000 miles now. Put the bypass filter on it and removed it when the blasted lines leaked. Someone at Amsoil had the idea that pipe fittings mate with flare type fittings. Will eventually re-install it on something using proper fittings. To date in 21 years this is the only screw up I've seen from Amsoil. Their bypass filter is great, just get your fittings elsewhere.

1966 Mercedes Benz Unimog: Had about 3500 kilometers on it wheh I changed the engine, all gearboxes, grease points, fan bearings, etc., to Amsoil.

That was about 5 years ago. After two changes you can now shift the 6 speed transmission from the first two gears to the other four seamlessly. I've never seen another 404 Unimog without Amsoil in it that could do that. The highest temp after 2 hours of flat out driving towing a deuce and a half trailer (fully loaded) was at the top of the engine, 136 degrees F. The transmission was at 134 degrees. I run it flat out at 55 to 65 MPH down the freeway.

1987 Land Rover Range Rover: Had 114,000 miles on it when we got it, now over 155,000. Got 12 MPG when we got it, after change to Amsoil engine and gear oils gets 20 MPG. The auto trans finally shifts properly after getting off my duff and changing it to Amsoil ATF.

1997 Saturn SL1: Well, 391,000 miles on it so far. Got it new and converted to Amsoil 0W-30. Changed it every 35,000 miles, filters every 12,000 or so.

Put another engine and tranny in it at 360,000 miles and 385,000 miles respectively. The valve guides were shot in the engine (not a function of lubrication) and the synchros were going on the tranny.

2002 Saturn SL: 115,000 miles so far. 4 oil changes with Amsoil 0W-30. Tranny on its first change with Amsoil ATF.

1972 Land Rover Series III Lightweight: Just got it, haven't converted it to Amsoil yet. Have used Amsoil MP (Metal Protector) to free up the door tops.