8AR engine internals look
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Joined: Feb 2005
Posts: 564
Likes: 162
From: Mid-West
I used to use Techron every 3K in my cars, but stopped doing it for a while. According to top tier gasoline suppliers (Shell, Mobil, BP, Costco) their premium gasoline contains detergents (the list of ingredients for each is a big secret) and does not need a use of Techron and such. May be I am too lax and should do it regardless. It is not expensive: $3-$5 each bottle.
Driver School Candidate
Joined: Nov 2018
Posts: 24
Likes: 1
From: TX
Oh I nearly forgot, to anyone who is concerned about this and definitely to the OP, you might also try Kreen.
I have used this occasionally in the past for engines that had severe carbon buildup. This stuff even removes varnish! Definitely not something to screw around with on your typical everyday maintenance though, however if someone like OP believes carbon buildup is a problem in their engine, my suggestion is to pour maybe a few ounces of this stuff in the gas tank at a fill-up...it doesn't take much. Also you can you might try pouring a few ounces into the engine oil about 200 miles or so prior to an oil change. Just make sure to follow the directions because I dont have the stuff in front of me at the moment.
Kreen
I have used this occasionally in the past for engines that had severe carbon buildup. This stuff even removes varnish! Definitely not something to screw around with on your typical everyday maintenance though, however if someone like OP believes carbon buildup is a problem in their engine, my suggestion is to pour maybe a few ounces of this stuff in the gas tank at a fill-up...it doesn't take much. Also you can you might try pouring a few ounces into the engine oil about 200 miles or so prior to an oil change. Just make sure to follow the directions because I dont have the stuff in front of me at the moment.
Kreen
Thread Starter
Lead Lap
Joined: Mar 2015
Posts: 423
Likes: 48
From: America
I have something to add to the use of engine cleaning chemicals. On the IS200t tuning thread we have been going back and forth about when the port mounted injectors are functioning. My official answer was the exact times when they function is Toyota proprietary information. So they wouldn't tell me much. But I was told they are used during cold start up, as well when the ECU feels it has been too long since they last fired. Like a cleaning cycle. Another user found a article from Car and Driver stating the port and DI injectors run together at low/medium throttle.
Why is this important.. Because the port injectors are the ones cleaning off your valves. So you want to drive in a manner that would engage them the most while using the cleaning product in your gas. You don't want to full throttle it everywhere on that tank of gas.
Why is this important.. Because the port injectors are the ones cleaning off your valves. So you want to drive in a manner that would engage them the most while using the cleaning product in your gas. You don't want to full throttle it everywhere on that tank of gas.
Thread Starter
Lead Lap
Joined: Mar 2015
Posts: 423
Likes: 48
From: America
Also, left field but have you NX owners heard about Orange Virus and the tune they are releasing... Pretty big stuff!
https://www.ovtuned.com/blogs/news/8...rom-patch-1-01
https://www.ovtuned.com/blogs/news/8...rom-patch-1-01
Driver School Candidate
Joined: Feb 2018
Posts: 36
Likes: 3
From: Ca
Been lurking around the Lexus forum for awhile. Looking for a car long term for the wifey as her lease was up on the Audi S3.
Kind of odd that the turbo cool down is still recommended as most luxury brands have pumps running when the car is off.
Kind of odd that the turbo cool down is still recommended as most luxury brands have pumps running when the car is off.
Thread Starter
Lead Lap
Joined: Mar 2015
Posts: 423
Likes: 48
From: America
I agree. I can not get an official answer on whether the water pump keeps running on shutdown to keep from oil coking. But I have never heard the water pump running after turn off. Either it's really quiet or it's not running.
Rookie
Joined: Dec 2015
Posts: 84
Likes: 4
From: BC
Don't know how much truth is in there but here it is, 120k mile on this test engine, taking it apart and checking the internals.
https://mobiloil.com/en/article/why-...tested-results
https://mobiloil.com/en/article/why-...tested-results
Rookie
Joined: Dec 2015
Posts: 84
Likes: 4
From: BC
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Lead Lap
Joined: Nov 2018
Posts: 470
Likes: 61
From: MN
Don't know how much truth is in there but here it is, 120k mile on this test engine, taking it apart and checking the internals.
https://mobiloil.com/en/article/why-...tested-results
https://mobiloil.com/en/article/why-...tested-results
Engine looks very similar to the 2AZFE in my old scion tc, it was open deck as well and it took quite a beating after I turbo charged it. I usually mist some sea foam into the intake of my direct injection cars once or twice year. This seems to help clean out anything, i started doing this after my friend had big problems with carbon build up on his direct injections only 2007 is250. Doing regular misting/cleaning really helped his car get back to running right and stopping his super rough idle. So i do it once a year or so just for good measure.
Thread Starter
Lead Lap
Joined: Mar 2015
Posts: 423
Likes: 48
From: America
EE talks about if the "Italian tune-up" helps or hurts your car. He cites a study that was specific to a DI 2.0L turbo engine. The study said the load on the engine was directly proportional to the number of carbon deposits in the engine. So essentially the study found that driving an engine similar to ours under heavy load (full throttle, trailering, hill climb, etc) will cause more carbon.
https://youtu.be/5C9Ie4BcYew
EE talks about if the "Italian tune-up" helps or hurts your car. He cites a study that was specific to a DI 2.0L turbo engine. The study said the load on the engine was directly proportional to the number of carbon deposits in the engine. So essentially the study found that driving an engine similar to ours under heavy load (full throttle, trailering, hill climb, etc) will cause more carbon.
EE talks about if the "Italian tune-up" helps or hurts your car. He cites a study that was specific to a DI 2.0L turbo engine. The study said the load on the engine was directly proportional to the number of carbon deposits in the engine. So essentially the study found that driving an engine similar to ours under heavy load (full throttle, trailering, hill climb, etc) will cause more carbon.
Thread Starter
Lead Lap
Joined: Mar 2015
Posts: 423
Likes: 48
From: America
Our engine does not run both DI and PI at all times. In fact, the most I could get out of Toyota was that the Port Injection is engaged when low load and during "cleaning cycles". They would never say the exact time or parameters for when DI or PI or both were used, stating proprietory information.
I was more interested in the fact that the lack of fuel on the valve to cool it helps to create even more carbon.
I was more interested in the fact that the lack of fuel on the valve to cool it helps to create even more carbon.
Our engine does not run both DI and PI at all times. In fact, the most I could get out of Toyota was that the Port Injection is engaged when low load and during "cleaning cycles". They would never say the exact time or parameters for when DI or PI or both were used, stating proprietory information.
I was more interested in the fact that the lack of fuel on the valve to cool it helps to create even more carbon.
I was more interested in the fact that the lack of fuel on the valve to cool it helps to create even more carbon.