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Hi guys, Just bought my first Japanese car yesterday, a 1991 SC400 GT-Ltd! With any project a repair manual is always the first thing I buy. I can't see any 91 repair manuals online, but plenty of 92s and 93s. Is a 92 or 93 manual still fine, if not, what were the major changes between those...

I am using BKR6E-11 NGK spark plugs in my 1uzfe (1991 UZZ31 JDM Soarer). They claim to last 25,000 miles. I feel the car performs better than with iridium and double platinum plugs. Anyone that needs a plug change might want to check these out. It should also be noted that race cars use...