Bill90Loyale Posted May 2, 2008 Share Posted May 2, 2008 This is a tale of pleasure, not intended as a recommended practice. Car: 90 Loyale. Miles: Within 20 of a Moonshot - 238K. In the Vermont winter that my car and I live in, I run 10w30. About 2 months ago, I dumped about a pint of automatic transmission fluid into the crankcase. Just a run about the block to clean out the oil ports? Not me my friends...oh no...not me. I ran that baby for two months. My oil pressure acted sort of normal most of the time, and abnormal at other times. Much like the engine's owner. Abnormal in what way, you might wonder? Well cruising on the highway, engine fully up to temp, my pressure would be nearing the golden mean of 45 psi, then would bog down as low as about 35 and stay there for awhile as my thinned-out oil foamed, and then would inexplicably rise to about 44 again. I began to hear connecting rod bearing noises in my mind, and sometimes seemed to hear them in my car at idle. I finally got around to draining the black kool-aid. Very satisfying as it ran like thinned black apple juice into my waiting oil catch pan. I half expected to find some metal glitter on the surface, and some lovely chunks of bearing material in the bottom of the pan. No, I had none of that my friends. Just pure Jim Jones licorice. Then I proceeded to dump in my new summer motor honey: Castrol 20w50. You could feel the engine tremble with anticipation as the golden syrup poured slowly down the filler neck. Buttoned everything up and.... Fired her off. She clattered at first, as the thick creme entered the starved (but shiny clean) hydraulic lash adjusters, then settled into a purr. I rolled her out onto the road and watched as my oil pressure needle rose like a steroid-filled, Viva Viagra popping professional athlete about to pay his date a visit. The oil pressure is now routinely at about 46, I gained somewhere around 6 psi at idle, and both me and the engine are feeling really really good. Time for a cigarette. Peace be with you my friends. Quote Link to comment Share on other sites More sharing options...
[HTi]Johnson Posted May 2, 2008 Share Posted May 2, 2008 HAH HAH I was laughing my rump roast off to that whole thread. Good work!! Quote Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted May 2, 2008 Share Posted May 2, 2008 Nice Written Story... So, the Automatic Trans Fluid, did Cleaned up the Oil System on your Subie, isn`t it? Quote Link to comment Share on other sites More sharing options...
Bill90Loyale Posted May 2, 2008 Author Share Posted May 2, 2008 Nice Written Story... So, the Automatic Trans Fluid, did Cleaned up the Oil System on your Subie, isn`t it? Yes it did. It is probably a better idea to run the ATF fluid in there for a day or two, rather than two months. Many have used ATF for this purpose (cleaning the engine internals) without apparent harm. Quote Link to comment Share on other sites More sharing options...
Ginger48 Posted May 3, 2008 Share Posted May 3, 2008 ATF is a very high detergent oil and has long been used as an additive for engine oil. Personally, I would much rather use ATF than Seafoam. At least ATF has lubricating abilities. The primary ingredients in Seafoam are naptha (Coleman fuel) and rubbing alcohol. Quote Link to comment Share on other sites More sharing options...
[HTi]Johnson Posted May 3, 2008 Share Posted May 3, 2008 ATF is a very high detergent oil and has long been used as an additive for engine oil. Personally, I would much rather use ATF than Seafoam. At least ATF has lubricating abilities. The primary ingredients in Seafoam are naptha (Coleman fuel) and rubbing alcohol. Just don't go sticking ATF down your intake:drunk:. Quote Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted May 3, 2008 Share Posted May 3, 2008 Marvels Mystery Oil is the Seafoam for your crankcase. ATF works too. Quote Link to comment Share on other sites More sharing options...
Loyale 2.7 Turbo Posted May 3, 2008 Share Posted May 3, 2008 Thanks for the Kind Answers! Quote Link to comment Share on other sites More sharing options...
somick Posted May 3, 2008 Share Posted May 3, 2008 Owner maual recomends 10W-30 for winter and 10W-40 for summer. Sam Quote Link to comment Share on other sites More sharing options...
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