
friendly_jacek
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Everything posted by friendly_jacek
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The tranny oil pan based sensor gives you a slower, average and lower reading. The line sensor gives you max oil temp and shows you quicker temp spikes. I have mine in the line. Fast driving is up to 160F (i have a medium sized tranny cooler). Towing, especially when hilly, spikes the temp to 210-220F easily. I use synth ATF BTW.
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Yes, this is the usual criticism for the HDEOs. However, you can make an argument that if you have an oil burning engine, it will burn more say 5W30 oil than the 15W40 oil. The Phosphorus content (cat poison) in light duty oils is roughly 900 ppm for SL oils and 700 ppm in SM oils vs. 1200 ppm in current delvac/delo/rotella oils. The difference in the volume of the burnt oil will easily offset the increased concentration and cat may see more P with light duty engine oils. Furthermore, the increased levels of detergents in HDEO (twice the gas oils) will likely unstuck the rings and decrease consumption even further. It's a win-win situation. The only problem with HDEO is decreased MPG in light duty service when oil does not reach the nominal temp (again, city driving, short trips, cold climate).
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I had the exact symptoms with TPS malfunction. The TPS was replaced by the dealer to the tune of $300+ only to find later that it was a loose connector problem (recurred with the new sensor). I am not saying that you have TPS problem, but any lose conection to many sensors with give you tranny defaulting to limp mode with wierd shifting. BTW, ECU stores a code in memory even when MIL is not illuminated. Sounds like you dealership is a bunch of incompetent idiots, it was a case in my case, too.
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I don't know why it is so hard to understand that the oil tem is not the same as coolant temp. Oil is heated by the pistons/cylinders (150C) and cooled by air at the bottom of sump (well, ambient temp). The net oil temp is somewhere in between, compounded that it takes at least 20-30 mins or 10-15 miles to reach the equilibrium temp. So, short trip, or city driving (90% of US cars) benefits from 5W30. Long distance, high speed (think autoban), high load or towing require 10W40 or heavier oil. That explains why heavier oils are recommended outside US. Look at you service and decide what you need. Unfortunately, customers in US get the dumbed-down, blanket advice: use only 5W30 (wonder why?). I use synth 5W40 in summers for a third year, since I do some towing with my 00 legacy. Can't say that I saw a significant difference in MPG compared with 5W30 (MPG sucks all the time). Thing is, that heavier oils give you more friction at the piston level but less at the valvetrain. These effects can almost even out for some engines. Boxers can indeed benefit from heavier oils because there is no need to have thinner oil to be able to pump it to the valve areas at the top of engine like you have in inline or V engines. Also, with solid lifters, you want to minimize the cam/lifter wear by using heavier lubricants and with healthy dose of Zn/P antiwear additives, like in API:SL/CI-4 rated HDEOs. ACEA:A3 rated oils are also good. Please feel free to disagree.
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No, it wont. You can only look at the tracings from front and rear O2 sensors and compare. If identical with a hot cat (after a nice drive), it's shot (poisoned). Now, you have a 1995. OBD2 came in 1996 for most cars. You have to check if your car uses OBD1 or 2. Those are totally different standards.
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How about getting a good obd2 interface for under $100 and learning how to use. Probably better than swaping good parts. It is possible that your cat is marginal and cold water cooled it down sufficiently for efficiency to drop below treshhold. It is also possible that water temporalily fouled the sensors, wires, connections, etc. I past, I replaced a lot of good parts because of my poor traubleshooting skills. Many marginal mechanics operate this way, too. In retrospect, not worth the cost and effort.
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OEM is the way to go; this is a good price, I paid $156 a year ago or so. However, based on my experience I would not be rushing to replace the sensor. Slow sensors was a big deal with OBD1 systems (pre 1996). Hoever, OBD2 was designed to diagnose bad sensors and catalists very well; so well that many states abandoned exhast testing. I replaced mine in 00 legacy with no results. You might want to look at your fuel pressure. Mine is on a high side, even AFTER I replaced a fuel pressure regulator (OEM). Incidentally, I used Subie Gal's service. Highly recommended. Edit: why you are saying rich? what is your LTFT?