[rpoz-29]

Anyone here have any experience with Amsoil products? I'm a little curious about their PS fluid, and motor oil.

[sgarnett]

I run Redline in my car, and M1 in my lawnmower and stuff like that. I'm a big fan of synthetics in general, ever since performing my own loss of oil pressure "endurance test" (several years apart on different cars).

In the dino car, I had to drive about half a block before I could safely pull off the road. That was enough to weld the crankshaft to the bearings.

In the synth car (running Syntec), I drove quite a bit further (in my morning fog) without ever noticing that the guage in front of the gearshift had dropped to zero. I noticed the slick when I was the last to leave work that evening, the night before Thanksgiving. I followed the trail while waiting for my ride to show up (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) After (miraculously) locating a used drain plug for a defunct import car and adding oil, it fired right up and I drove it home. I later checked the compression and it hadn't changed.

I also used to have an old Subaru with valves that would clatter for the first 20 seconds after the first start of the morning running dino. I could hear the exact moment when the oil reached them (or possibly the hydraulic lifters, if it had them). With synthetic (M1, I think), I never heard them at all.

The only engine (with 1, 3, 4, 6, or 8 cylinders) I don't use synth in is my high mileage Dodge. It doesn't seem to have any major oil leaks, but the 5.9 is notorious for leaking into the manifold. Because I don't know what it ran before I got it, I don't want to take a chance on cleaning out the dirt that's plugging the leaks.

My car has one of the "oil-fired" LS1s that needs all the viscosity stability it can get. I also work it hard on Sundays, so it get's the good stuff in 10W-40 (IMG:http://www.frrax.com/rrforum/style_emoticons/default/smile.gif) One of the main local autocross event sponsors (and the only local speed shop that isn't drag, dirt, or pimp oriented, ) stocks Redline at a competitive price and their shop is on my way to work. That makes Redline the clear winner, and I do think I'm using less oil with Redline than I did with M1 or Royal Purple. The other engines get M1.

I'd run ANY synthetic before ANY dino oil, but I've never had a reason or occasion to try Amsoil.

I also run Redline PS and diff oils, but I use an arcane mix of 3 quarts Pennzoil Synchromesh plus 1 quart Havoline D3 dino ATF in the T56. I blew a hose off the fill pump, made an AWFUL mess, and had to top off with what I had on hand. Pennzoil confimed that there were no chemical compatibility issues and it shifts fine, so I'm still running it (IMG:http://www.frrax.com/rrforum/style_emoticons/default/thumbup.gif)

This post has been edited by sgarnett: Jun 7 2006, 10:40 AM

[LT4Firehawk]

I also used to have an old Subaru with valves that would clatter for the first 20 seconds after the first start of the morning running dino. I could hear the exact moment when the oil reached them (or possibly the hydraulic lifters, if it had them). With synthetic (M1, I think), I never heard them at all.

My LT4 does that on M1, wonder if switching to Amsoil/Redline would help with that?