2025 ESS350 Fuel Injection?
 

Does the 2025 ES350 have Direct Injection, Port Injection, or both?

My wife had a 2009 IS250 with Direct Injection. The backs of the valves would get caked with carbon because there was no gasoline in the intake to wash them off. Same year IS350 did it differently. They used both. Direct Injection for power and at the same time, port injection to keep the valves clean.

I am wondering what type of injection the new ES350 has and if I will have to worry about removing the intake to clean the valves.

Thanks for any insight

Both. It alternates and you can actually hear when it cycles back and forth.

7th gen ES 350 has both DI and PI to hopefully prevent intake valve carbon build up. I have never seen the intake valves on a 7th gen ES350 after 30k or so miles to see how effective this complicated system is doing. Use top tier fuel.

Both, Toyota's D-4S.

According to the CCN video (at 9:04), it appears the D4S system do work as intended @ 80k. However, as recommended, it's still best to consistently use top-tier fuel.

Edit: Also an Italian Tune-Up once a month will help to minimize carbon buildup.

Great it works. Was this DI and PI system, also in previous gen ES 350's?

From what I understand, the 7th-gen ES 2GR-FKS engine incorporates the D-4S system, whereas the previous 6th-gen 2GR-FE appears to feature only port injection.

That said, I'll defer to the more technically knowledgeable members for confirmation.

This is true, and I highly endorse it and recommend it to people often. But it is not particularly for the valves, it’s for the ring carbonization, since the (stupid and ill-advised, politically driven) advent of low-tension rings. Port injection at any speed/rpm will take care of the valve issue. Ring carbonization issue is very different and no method of injection can help that.

Correct.

The 2GR-FE has port only, which is fine. I have often admired the fact Toyota stuck with port injection on that, vs. switching to DI for small mileage gains, like almost all other contemporary manufacturers. It saddles you with maintenance nightmares; and Toyota rejected that. I like that.

The 2GR-FSE, like in the 2006/7+ GS, IS, RC - has the dual (D-4S, also on the 4.6 V8), and that evolved (very mildly) in 2015 to the 2GR-FKS (Atkins sim cycle, thus the “K”). That’s the engine that went into the 2019+ ES. Without the GS in the lineup, Lexus had to bump the ES engine up a big step to stay competitive. ES 1st to 6th gen always had good, solid, but not stellar/cutting edge power plants. 7th gen stepped it up to compensate for the lack of GS/performance sedan in the line-up.

Top tier fuel AND Techron. I use 1/2 bottle 2-3 times a year. I once used a full bottle in my old RX and soon after I developed a fouled or clogged fuel injector. Might not be related, buy I'd rather use less cleaner more often to avoid "throwing a clot".

I agree. I’ve always used Top Tier Premium in all of my vehicles. My son in law, a former Lexus mechanic, told me that I could burn regular but put a bottle of a fuel system cleaner in every three months to eliminate carbon deposits.

Interesting anecdote re: Techron or Gumout Regane (same active ingredient - polyetheramine aka (PEA).

Chevron says to use the stuff every 3k miles, based on their teting. Starting in 2010, using two vehicles as my test beds, I experimented with when to use PEA as a cleaner. I had myself and the other driver record mpgs of every single tank of gas for years (easy to do, paper in the center console, write it down while filling). I experimented with when to add the PEA and used the average mpgs as a proxy for injector/system health. My testing showed the best time to use the stuff was every…. 3 to 4k miles. So all I did was prove Chevron was correct 100%. It aslo proved it more than paid for itself in keeping MPGs peak, vs the tail-off degradation over time.

Not all FI cleaners have PEA and it’s just not worth using the old-school ones with PEA easily availabe. Techron, Gumout Regane HM, or Redline FI cleaner all use it. Most top-tier fuel, besides Chevron DOES NOT use it; they used much cheaper cleaners. There is nothing about the “Top Tier” specs that require using the most advanced cleaners - only that demonstrated cleaners are in fact used.

FYI, AutoZone currently has a BOGO on Techron Complete Fuel System Cleaner. :cool:

Good tip. I stock up on them then. O’Reilly, Autozone, many places also carry the Gumout Regane High Mileage Fuel treatment. 6ozs is the treat size (it’s more concentrated than Techron, which is a bonus). 12 oz (two treatement) bottles used to be about $10 (maybe more now). So it’s also a cost-effective option. I usually buy the Gumout when NOT on sale, or Techron when 2 for 1. Does not matter which brand; it’s the content that matters.