Not going to lie here.... I'm mildly terrified of this happening to my 460, haha. Even though I have roughly half the miles on my car (38k), I knew damn well that the dealers here wouldn't jump through hoops for me like your dealership did with you. Excuse me if I missed this part, but did you hear any excessive knocking or see any blue smoke?

 

TRD - Thanks for the comment. I have NOT had any knocking or blue smoke.

 

UPDATE**

The dealer has performed an oil change with 0W-20. The wife drove it all weekend and so far no more issue. I am not saying this fixed it, but, we will see.

The Service Drive Manager says the oil messes with the knock sensor throwing everything off. Now I'm not a car guru but what does the Knock Sensor have to do with oil. I thought it reads air/fuel mixtures...not oil.

 

Having the same symptoms with my gs460 2008 transmission lag + hesitaion while acceleration.
I did change for :
- Transmission oil + filter.
- Spark Plug.
- Knock sensor.
- Fuel filter.
- Injectors cleaning.
- Cats removed.
- Throttle body cleaning.


But nothing change .

Note:
Using Castrol Magntic 5W-30.

 

Gs46046 - I hear ya. But the dealer is telling me that you can ONLY USE 0W-20. Since my last oil change that the dealer just did, as a process of elimination, the car has ran better until yesterday (day 5). Its not very noticeable but I can tell its about to start acting up again. I give my car about another week before it starts lagging again.

 

snoball, what part of town are you located at? If you don't mind me asking. I am in the Humble area and I would like to meet with you sometime and have you to test drive my GS460 if you're OK with that. The reason I would like you to do this is because I'd like to hear from your past experiences to my car if it's having similar symptom related in this thread. I owned it since 40K miles and currently has 95K miles, 0W-20 Mobile 1 full synthetic changes every 10K miles. Transmission fluid drains and refills @ every 25K miles. Original plugs.

 

I am in the Woodlands/North Spring area. I'd be happy to check out your car at some point in time. May be a few weeks. With four kids and all of them in sports, I don't have to take a crap sometimes. I'm not sure if you know this but your transmission is suppose to already have :lifetime" fluid. you should have to do that unless absolutely necessary. That's what Northside told me.

 

Sure thanks snoball for considering to check out my car whenever you have time ... I really don't buy that "lifetime" transmission fluid from either the manual or the dealer said for this particular vehicle or else, I just do my best to hope for a long lasting, less headache and more enjoyable driving.

 

Oil viscosity has nothing to do with the knock sensor.

 

703-
You are correct sir!

 

Looks like the valve guides are causing the knock sensor to retard the engine. All the 4.6Ls can develop this problem.