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I have located a few HF transmissions using car-part.com, the closest being in IL, I live in MN. Not sure if shipping would be cheap, thats why I am trying to find it locally.
I have a 1991 Civic Si, not a crx. I am currently seeing 38-41mpg in MN. Up from the 28-29 I would see before I started ecomodding. I deleted my pass side mirror, have a front air dam, undertray, roof extension and rear wheel well covers. I have a semi synthetic in trans(GM synchromesh) did that about 5k miles ago. Car doesn't need a tune up, I have a two year old dist/cap/rotor, ngk iridiums with 5k on them, new bosh 02 sensor, fuel filter, pressure regulator, too. I made a warm air intake which helped with warm up time, but thats it.
I would put synthetic oil in my engine if it werent for the fact the oil pan seal is bad, has a slow leak. I'm worried that it will begin to leak elsewhere if I go with 0w30 mobil one, so I just use cheap 5w30. Engine has 250k on it. I have thought about buying a cheap set of steelies and throwing on some 175s, the car currently has 185s on it on aluminum wheels. The gearing is what is killing me, though. I usually cruise at 65-75mph, so I see 3,000-3,800rpm on my commute to work. That HF transmission would help big time, or if I had more discipline and stayed at 55, which is ten below the speed limit I would probably gain a couple ticks as well.
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