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2013 Lexus GS350Ever wondered what original spark plugs look like at 107,0XX miles
Greetings,
I just recently (2 weeks ago today) purchased a one owner 2013 Lexus GS350 which was meticulously serviced at the Lexus dealership...except new spark plugs! Nevertheless, I watched a few DYI spark plug changes on You Tube and decided to change them out since I did the regular maintenance when I get a new to me vehicle. New in cabin filter, engine filter, tires rotated and balance, all wheel aliment which I did not need since it was so spot on. Oil change, brake pads, transmission fluid changed, rear end fluid change all done by the dealer before purchase. Back to the sparks plugs! What do you guys think????
Last edited by hudd1988; 03-03-22 at 09:31 PM.
Reason: More specific
I just recently (2 weeks ago today) purchased a one owner 2013 Lexus GS350 which was meticulously serviced at the Lexus dealership...except new spark plugs! Nevertheless, I watched a few DYI spark plug changes on You Tube and decided to change them out since I did the regular maintenance when I get a new to me vehicle. New in cabin filter, engine filter, tires rotated and balance, all wheel aliment which I did not need since it was so spot on. Oil change, brake pads, transmission fluid changed, rear end fluid change all done by the dealer before purchase. Back to the sparks plugs! What do you guys think????
Last pic is the day I had ceramic tint on all windows to include the front windshield. The most expensive tint job I ever purchased. $825!!!
I might be wrong, but I thought spark plugs are supposed to be replaced at 60K service intervals on this engine. If so, I'm surprised a "meticulously serviced" vehicle at the dealer would miss this. I mean, my experience is the Lexus service departments are pretty much by the book on this stuff. I'd check the service history at the my Lexus site and compare to what should have been done based in the manual. And of course, do the diff(s), and I do a drain and fill on the trans every 60K.
I see nothing wrong with those spark plugs - the center electrodes and ground electrodes display no wear. Those 'old' spark plugs are good for at least another 150k miles. You'll see no mileage or performance improvement with new spark plugs over those 'old' sparks plugs. But if it makes you feel good to have new spark plugs, then enjoy the feel good!
I might be wrong, but I thought spark plugs are supposed to be replaced at 60K service intervals on this engine. If so, I'm surprised a "meticulously serviced" vehicle at the dealer would miss this. I mean, my experience is the Lexus service departments are pretty much by the book on this stuff. I'd check the service history at the my Lexus site and compare to what should have been done based in the manual. And of course, do the diff(s), and I do a drain and fill on the trans every 60K.
The sparkplugs have a 100,000 mile life, but for "emissions" lexus wants them changed at 60,000 miles.
I just recently (2 weeks ago today) purchased a one owner 2013 Lexus GS350 which was meticulously serviced at the Lexus dealership...except new spark plugs! Nevertheless, I watched a few DYI spark plug changes on You Tube and decided to change them out since I did the regular maintenance when I get a new to me vehicle. New in cabin filter, engine filter, tires rotated and balance, all wheel aliment which I did not need since it was so spot on. Oil change, brake pads, transmission fluid changed, rear end fluid change all done by the dealer before purchase. Back to the sparks plugs! What do you guys think????
If those came out of my car, I'd put them back in if they were firing OK. New ones will look like that in a week or two and you wouldn't be able to tell the difference.
I changed mine at 100k. Not sure why people are saying they would take out a 100k spark plug, then put it back in lol. Replace it with a new one and you don't have to think about it for another 100k miles. I paid $78 for 6 oem plugs from an online Lexus dealer. On the 450h the plug closest to the firewall on the driver side was a pain in the butt to remove, Lexus put some foam in the way. For the 450h the service manual says change at 100k miles.
I changed mine at 100k. Not sure why people are saying they would take out a 100k spark plug, then put it back in lol. Replace it with a new one and you don't have to think about it for another 100k miles. I paid $78 for 6 oem plugs from an online Lexus dealer. On the 450h the plug closest to the firewall on the driver side was a pain in the butt to remove, Lexus put some foam in the way. For the 450h the service manual says change at 100k miles.
The only part of the plug that matters is the gap where the spark is generated. If the plug is mechanically sounds, that gap will keep firing as long as the electrode isn't eaten up. The carbon buildup is going to happen regardless of the plug unless you are running H2 as a fuel.
The only part of the plug that matters is the gap where the spark is generated. If the plug is mechanically sounds, that gap will keep firing as long as the electrode isn't eaten up. The carbon buildup is going to happen regardless of the plug unless you are running H2 as a fuel.
Yes but why waste time doing the job again in 20k miles or having to check your plugs every 10k. Just replace it at the recommended interval and forget it, a lot less work. It's preventative car maintenance, your not waiting for the part to get close to going bad.
Yes but why waste time doing the job again in 20k miles or having to check your plugs every 10k. Just replace it at the recommended interval and forget it, a lot less work.
If my plugs looked like that at 100K, I wouldn't check them again for another 100K miles unless warranted by a misfire code.
Got to love the just do what Lexus says (Lifetime fluid) crowd, change up just do what Lexus says. lol!
To the original op about your Plugs. - They went 107K. Change at 60k from now on. I always feel a difference. This pic speaks 10k words. I researched a while back that the Stock Coils send 30k Volts to the plugs, in so many multiple firings per cycle. This is not a 1.5 volts flashlight situation. Good for you that you wanted to do some maintenance and treat you car like a Lexus.
Do old sparks affect MPG? I'm not sure if mine have ever been changed, I'm at 106K.
I get pretty bad MPG.. like 19mpg combined. My air filter is clean. Wondering what else I could do to improve MPG.
My 2019 has been getting 17-19 MPG combined, and has been like this since I got it brand new. Traffic and stop lights play a big role on this and the GS is thirsty in traffic and is not happy.
I think I saw somewhere where the factory plugs have some kind of a mark on the top of the plug. Denso only supplies marked ones to the factory, other than that there're the same. Maybe it was car care nut guy, can't remember now. The way to tell if they've ever been changed or not.
03-03-22, 09:27 PM
2013 Lexus GS350Ever wondered what original spark plugs look like at 107,0XX miles
