padoos1 Posted July 28, 2009 Share Posted July 28, 2009 I know i could look this up in the owners manuel, but at what mileage should i replace the plugs in my is350? should i stay with oem or go with somthing else? any opinions? thanks in advance for any advice good bad or ugly. Quote Link to comment Share on other sites More sharing options...
Sidney07 Posted July 28, 2009 Share Posted July 28, 2009 Seems to me like plugs are way over-hyped. No way a plug by itself will do anything "extra" for your car. Just use OEM, quality stuff. Of course you don't want to skimp and buy cheap, but OEM should be fine. I could tell you when they need to be replaced, but I won't. "give a man a fish...." yadda yadda.... Quote Link to comment Share on other sites More sharing options...
Lexusfreak Posted July 28, 2009 Share Posted July 28, 2009 Use OEM....period which are iridiums. And as for the interval.....look at the owners manual. ;) Quote Link to comment Share on other sites More sharing options...
bartkat Posted July 28, 2009 Share Posted July 28, 2009 80 to 100 K miles. It seems to vary. Quote Link to comment Share on other sites More sharing options...
smooth1 Posted July 28, 2009 Share Posted July 28, 2009 Yeah, OEM Denso's are the best anyway. And they ain't cheap........ Quote Link to comment Share on other sites More sharing options...
1990LS400 Posted July 28, 2009 Share Posted July 28, 2009 Wow, the spark plug replacement interval for the 2009 GS, IS, LS is only 60,000 miles or 72 months but for the ES it is 120,000 miles or 12 years: http://www.lexus.com/pdf/service/Sedans.pdf I wonder why the intervals are getting shorter or not increasing with modern technology -- the replacement interval for my 2000 LS400 is 120,000 miles. The two times I had the spark plugs on my first LS replaced - at 90,000 and 180,000 miles - the old ones looked like new when they were pulled out. Odd how recommended oil change frequency is getting shorter too. Oil change frequency under normal use on some Lexus vehicles used to be 7,500 miles. Quote Link to comment Share on other sites More sharing options...
dcfish Posted July 28, 2009 Share Posted July 28, 2009 OEM Quote Link to comment Share on other sites More sharing options...
padoos1 Posted July 28, 2009 Author Share Posted July 28, 2009 OEM THANKS GUYS I WILL STICK WITH OEM THEN. Quote Link to comment Share on other sites More sharing options...
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