High RPM to Remove Carbon

[edyvw]

I can’t imagine driving my Corvette for that long at 4000rpm but maybe I will try doing a 30 minute run with the rpm at 3000 and see what kind of oil temperatures I see. I like the idea of possibly removing any IVD that might have formed in the last 106,700 km.
I would probably have to hold it in 5th gear at 70 mph in order to get the rpm at 3000, because 70mph in 8th gear is around 1300-1400 rpm.

Try something like Fiesta 1.0 or Corsa 1.0 on Autobahn, going 4500rpms for an hour or so.
Corvette is going to be fine.

 

[edyvw]

I agree. They can easily handle sustained 4k rpms. More wear on a cold start. The only thing sustained 4k rpms will do is heat the oil up more which will speed up the oxidation rate.

BMW UOA. One with 4,600 miles is Castrol Edge 0W30, winter driving, lots of daily ski trips.
One with 5000 is Castrol 0W40, an extensive track runs. Sessions as long as 1 1/2hrs without a pit stop.

 

[Patman]

Try something like Fiesta 1.0 or Corsa 1.0 on Autobahn, going 4500rpms for an hour or so.
Corvette is going to be fine.

I’m sure it would be fine, I just don’t know if I personally want to be driving it that long at that rpm.

 

[edyvw]

I’m sure it would be fine, I just don’t know if I personally want to be driving it that long at that rpm.

Lol, that is another thing.

 

[BMWTurboDzl]

Not sure why anyone would think this worrisome or wonder about oil temps? Any modern engine should sustain 4k indefinitely.

I regularly flog my '11 6.2 harder than that for longer than that. Towing in Colorado, you have to.

If this is to be believed, any modern gasser that tows is clean as a whistle

Accelerated wear on the transmission? Last time I went up to 4k rpms in my BMW the charge pipe failed. Granted it was 6 yrs old at the time.

 

[emmett442]

It seems that not many here have driven cars from before the days of overdrive

 

[Patman]

It seems that not many here have driven cars from before the days of overdrive

True, I have only owned one car that didn’t have an overdrive transmission (my first car, a 1979 Mustang). I do know that there were many muscle cars in the 60s that had 4.10 gears in the rear and a non overdrive transmission so they could easily be running at 4000 rpm on the highway.

 

[JRay’07]

Drive your car conservatively and you will regret it. Drive aggressively to clean the engine and you’ll regret that too.

Whether you use the Italian tune-up method or not, you’ll regret it either way.

 

[raaizin]

When DI first came out VW recommended 20min @ 3k rpm to keep deposits in check. I had an Audi 3.2 and did this once or twice a year on the ride home. I got rid of the car at 148k miles with zero carbon issues

 

[Patman]

Drive your car conservatively and you will regret it. Drive aggressively to clean the engine and you’ll regret that too.

Whether you use the Italian tune-up method or not, you’ll regret it either way.

I never regret driving my Corvette aggressively

 

[KrisZ]

Not sure one needs to do it on a weekly basis, but high RPM operation is beneficial especially for vehicles that spend most of their lives driving in city traffic or short trips.

 

[JohnnyG]

This is Italian tune up:
View attachment 268911

Nope, not even close.

 

[edyvw]

Nope, not even close.

Lol. Ok enlighten us.

 

[JohnnyG]

Lol. Ok enlighten us.

I did, in an above post. It's the downshift that does the work. Even downshifting on hills is mare beneficial than constant high rpm.
That said, it is detrimental to an engine to be babied al the time.

 

[Andyd95]

I’ve always done a bottle of Techron followed by a long highway drive (like an hour one way, shut it off grab lunch or coffee), and an hour back.

 

[ATex7239]

Tune up your engine and wear out your transmission all at the same time.

 

[svenson]

bmw technicians for DI engines suggest that too, once a week.actually they suggest it for half an hour.
once oil is warmed up,then beat the engine up and drive the car like it was stolen.

although i do that ,its part of my driving habits , i end up with red light oil pressure every time when session has ended and i shut it off. DI engines have that problem.
my alfa-romeo was driven short trips mostly but never did that trick and engine never had any carbon build up problems.i guess today's cars are more sensitive.

 

[edyvw]

I did, in an above post. It's the downshift that does the work. Even downshifting on hills is mare beneficial than constant high rpm.
That said, it is detrimental to an engine to be babied al the time.

So, you basically did not understand that post at all. It is oil temperature as a consequence of pushing the vehicle uphill, definitely not bcs. I drove at 4k rpm.

 

[notharry]

Use Techron and forget the Italian tuneup.

Techron was what a seasoned Volvo tech recommended to use before every oil change in the 1980's. My dad did and he never had a fuel related issue at over 200000 miles. Ran like a swiss clock.

 

[Mechanician]

The Italian Tune-Up. I took this from another group where a guy had great success using the method described below. The images below are before/after I believe. Not the greatest images. This method is more than just WOT though. As you can see, he drove `15 mins with sustained RPMs at 4k.

• Step 1. Fill up with premium, Top Tier, non-ethanol fuel if you have it in your area. Drive for half a tank.
• Step 2. Drive at highway speeds, and using the manual mode, shift down to 4th. RPM should be around 4k rpm. Keep driving for 15 minutes. This builds up the oil, coolant and engine temps, as well as in your CAT. Then accelerate to redline (6500rpm). Decelerate down to normal speeds. The fuel cut during decel will cool the engine and the high vacuum will pull residues and carbon out.
• Step 3. Repeat Acceleration/Deceleration 4-5 times. Do this once a week.

"As Jason mentions the occasional hard acceleration, like on a highway entrance ramp is not enough. Prolonged higher temps is needed. Hard acceleration also supplies additional fuel to the engine, and using Premium fuel, with the added detergents improves the carbon removal. Getting the oil and transmission temps up is good, especially in cold temps. My oil temps reached 220F, normally around 170F. My transmission temps got up to 205, normally 160F. Both quickly cooled down."

View attachment 268880

If you fill up with Top Tier fuel once a week - will you need to worry about carbon at all?
The two old methods to remove carbon were water, and uncooked rice.