brandlj

Thanks so much for the info. I will run these for a while and probably switch to the Irridium plugs later. The car runs great with these plugs and I am averaging 19.8 mpg in mixed city and highway miles. On the highway I am averaging 25.6 mpg at 70 mph in NE Louisiana. John

Hello all! I am a new member with a just purchased 1999 LS 400. It was a one owner car with 90,000 miles on it. The selling dealer is a Toyota Dealer and part of the deal on the car was that the 90,000 mile maint. was to be performed along with 4 new Michelin tires. The dealer changed the coolant, the timing belt, the serpentine drive belt, the brake fluid, the oil and filter, the transmission fluid, the air filter, the A/C pollen filter and the spark plugs. All parts were Toyota or Lexus parts except for the spark plugs. He used NGK V-Power plugs. My owner's manual stated that thhis car uses Irridium tipped plugs. I know the NGK's were cheap for the dealer and I was wondering if they are going to be OK for the car. The motor runs great. How long will these plugs last? Thanks John