The piston soak seems to really make a difference with these engines. Mine is starting to creep back up so I‘m going to soak it again at the next oil change. It’s not a cure but it is certainly a welcome and significant improvement.
2008 Scion tC Valvoline Daily 5w30 and 1 qt HPL EC30 3543 miles
- Thread starter Highboy
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Highboy
Site Donor 2022
Update….1679 miles and I added my first quart of HPL 5-30.
This somewhat mirrors my experience with the 2AZ in Project xB²
Obviously OPs engine was better cared for
Good to see we have HPL engine cleaners and oils to help us
Obviously OPs engine was better cared for
Good to see we have HPL engine cleaners and oils to help us
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How long did you let the B12 soak for?
Highboy
Site Donor 2022
I did it for 2 days. After the first day I put a socket on the crank bolt and turned over engine a few times. Then I refilled the cylinders again let it sit for a day and then cranked it over to get the excess fluids out.
With that much consumption I think you might have cylinder wall damage. I have a 08 TC, bought at 130k, now at 161k. Burned 1qt/1k miles at first, managed to improve to 1qt/2k miles, so I typically just slightly overfill at OC and add a bit over a quart in the middle of every OCI now. It does burn more with high speed highway driving(80mph+), when I take long road trips w/ it and cruise 80-85 for hundreds of miles, the consumption increases to about 1.5k/quart
Since you've had yours since 33k and have done 5k OCI with presumably good oil, I wonder why there is such a discrepancy. Is your car auto or manual, and how do you drive?
I did:
- 5k OCI, M1 0w40, OEM or fram filter at every change
- Berrymans engine flush @ 135k
- HPL EC @ 145k
- Berrymans engine flush @ 155k
- Drive the piss out of it everywhere(manual trans)
Honestly saw the most improvement with the Berrymans, the first flush improved it by 400miles/quart right away.
Keep us updated, curious as to whether that level of consumption can be improved. Theres a guy on youtube who has rigorously tested every non teardown method to clean up his rings on the older gen 4cyl in a late 90s corolla that was at a quart/500 miles and the only thing that worked was berrymans chemtool piston soak which improved it to 1k/quart. Judging by his borescope footage, he unstuck 2 of the rings, and one cylinder still always has a bunch of oil pooling on top of it.
EDIT: just to clarify, I did berrymans engine flush, not the chemtool piston soak. So I just poured around half a bottle into the crankcase and let it run for 10-15 mins before the OC.
Since you've had yours since 33k and have done 5k OCI with presumably good oil, I wonder why there is such a discrepancy. Is your car auto or manual, and how do you drive?
I did:
- 5k OCI, M1 0w40, OEM or fram filter at every change
- Berrymans engine flush @ 135k
- HPL EC @ 145k
- Berrymans engine flush @ 155k
- Drive the piss out of it everywhere(manual trans)
Honestly saw the most improvement with the Berrymans, the first flush improved it by 400miles/quart right away.
Keep us updated, curious as to whether that level of consumption can be improved. Theres a guy on youtube who has rigorously tested every non teardown method to clean up his rings on the older gen 4cyl in a late 90s corolla that was at a quart/500 miles and the only thing that worked was berrymans chemtool piston soak which improved it to 1k/quart. Judging by his borescope footage, he unstuck 2 of the rings, and one cylinder still always has a bunch of oil pooling on top of it.
EDIT: just to clarify, I did berrymans engine flush, not the chemtool piston soak. So I just poured around half a bottle into the crankcase and let it run for 10-15 mins before the OC.
Those were some serious oil burners giving the GM ecotech a run!!
I had to replace a motor in a 2008 Scion last year because the young lady didn't listen to my pleads to check her oil - at the time the motor was burning a quart in like 700-1000 miles. She ran it dry and burned it up. The replacement motor was used and turned out to be a good motor that had been thru the toyota recall service. It doesn't burn but 1/2 to 3/4 quart in 5000 miles. We been running full syn 5w/30 in it be it supertech or Quaker state or STP syn and change at 5000 miles.
I had to replace a motor in a 2008 Scion last year because the young lady didn't listen to my pleads to check her oil - at the time the motor was burning a quart in like 700-1000 miles. She ran it dry and burned it up. The replacement motor was used and turned out to be a good motor that had been thru the toyota recall service. It doesn't burn but 1/2 to 3/4 quart in 5000 miles. We been running full syn 5w/30 in it be it supertech or Quaker state or STP syn and change at 5000 miles.
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