Originally Posted By: 01_celica_gt
Originally Posted By: pbm
Originally Posted By: 01_celica_gt
That engine already burns oil or will eventually from the oil return holes being clogged, only 4 holes, the updated pistons have 8 holes instead.
I have rebuilt 4 so far with different mileage and...every single one had stuck oil control rings with fully carboned up oil return holes.
Use a full synthetic at a reasonable OCI (your previous 6k is just fine, just go by mileage and not time) and this will delay your oil return holes from being clogged up.
I believe that 2002 was the last year before Toyota corrected the 'stuck ring' problem on the 1ZZFE.
The 2003 was the first year of the newer (9th) generation Corolla and didn't have this problem.
My b-i-l has over 230K on his 2004 and it's had synthetic only @ 10K intervals for at least the last 50K. It uses about a quart (or less) during the OCI.
The 1ZZFE after 2002 is not prone to sludge if reasonably OCI's and/or syn. are used.
05+ is when the issue was fixed, I own a 05 complete engine that I just fully rebuild, came with the updated piston.
Also was offered a 04 complete short block which did not have the updated pistons.
I got my parts from a Toyota Tech...I'm sure he and I know more then you about the 1ZZ-FE engine. Monkeywrenchracing.com sells those engines, they will tell you the same. Unless you are the engineer of the engine I'm sure your clueless still.
Nonsense. I have discussed this with multiple technicians at Toyota and it only applies to the 8th gen. I have a good friend who works there as well.
OP, I have been using Fram Tough Guards since the Pure One's have been ripping along with Mobil 1 Advanced Fuel Economy following 7500km intervals per mfr recommendations. I am too impatient to run longer intervals so I keep them short. Im confident you could go 10k miles without issue but if your current habits dont bother you keep following what you already do, you have confirmation its working. Also, do change the PCV valve, cost me about 11$ at the dealer and takes 5 mins to change. I changed mine recently and the very slight consumption it had seems to have gone away completely. Be sure to get OEM PCV. Costs 2-3$ more so why bother with Fram? My consumption was almost half a quart per 5k miles (slightly less than 1/2 quart). This car is not fussy about oil type or brand. Change your PCV and next change use a TG filter and keep doing what you are doing. Im at 120k miles and I couldnt be happier with it. How often do you get the transmission fluid changed? Another thing that is very easy to do by yourself and will help keep it running for years to come.
Originally Posted By: pbm
Originally Posted By: 01_celica_gt
That engine already burns oil or will eventually from the oil return holes being clogged, only 4 holes, the updated pistons have 8 holes instead.
I have rebuilt 4 so far with different mileage and...every single one had stuck oil control rings with fully carboned up oil return holes.
Use a full synthetic at a reasonable OCI (your previous 6k is just fine, just go by mileage and not time) and this will delay your oil return holes from being clogged up.
I believe that 2002 was the last year before Toyota corrected the 'stuck ring' problem on the 1ZZFE.
The 2003 was the first year of the newer (9th) generation Corolla and didn't have this problem.
My b-i-l has over 230K on his 2004 and it's had synthetic only @ 10K intervals for at least the last 50K. It uses about a quart (or less) during the OCI.
The 1ZZFE after 2002 is not prone to sludge if reasonably OCI's and/or syn. are used.
05+ is when the issue was fixed, I own a 05 complete engine that I just fully rebuild, came with the updated piston.
Also was offered a 04 complete short block which did not have the updated pistons.
I got my parts from a Toyota Tech...I'm sure he and I know more then you about the 1ZZ-FE engine. Monkeywrenchracing.com sells those engines, they will tell you the same. Unless you are the engineer of the engine I'm sure your clueless still.
Nonsense. I have discussed this with multiple technicians at Toyota and it only applies to the 8th gen. I have a good friend who works there as well.
OP, I have been using Fram Tough Guards since the Pure One's have been ripping along with Mobil 1 Advanced Fuel Economy following 7500km intervals per mfr recommendations. I am too impatient to run longer intervals so I keep them short. Im confident you could go 10k miles without issue but if your current habits dont bother you keep following what you already do, you have confirmation its working. Also, do change the PCV valve, cost me about 11$ at the dealer and takes 5 mins to change. I changed mine recently and the very slight consumption it had seems to have gone away completely. Be sure to get OEM PCV. Costs 2-3$ more so why bother with Fram? My consumption was almost half a quart per 5k miles (slightly less than 1/2 quart). This car is not fussy about oil type or brand. Change your PCV and next change use a TG filter and keep doing what you are doing. Im at 120k miles and I couldnt be happier with it. How often do you get the transmission fluid changed? Another thing that is very easy to do by yourself and will help keep it running for years to come.
