Have you ever heard of the LS1!!!!quote:
Originally posted by JHZR2:
Ive never seen any consumption of 30wt oils in vehicles suggesting the use of them.
JMH
Have you ever heard of the LS1!!!!quote:
Originally posted by JHZR2:
Ive never seen any consumption of 30wt oils in vehicles suggesting the use of them.
JMH
All other things being equal, a HDEO will NOT create deposits that damage O2 sensors or catalytic convertors.quote:
Originally posted by toyvwbenz:
Motorbike,
I don't think my recent poor mileage is completely caused by the Mystik CI-4. The engine is not running quite as well as normal. I'm getting a bit of vibration at hot idle. I'm guessing the 02 sensor is getting weak. About 97K miles on the original. Maybe the CI-4 oils are putting deposits on the sensor? Are there any additives that will clean an O2 sensor?
Oh you bet I have.quote:
Originally posted by SSDude:
Have you ever heard of the LS1!!!!quote:
Originally posted by JHZR2:
Ive never seen any consumption of 30wt oils in vehicles suggesting the use of them.
JMH
Well you did not post that the engine was running poorly alsoquote:
Originally posted by toyvwbenz:
Motorbike,
I don't think my recent poor mileage is completely caused by the Mystik CI-4. The engine is not running quite as well as normal. I'm getting a bit of vibration at hot idle. I'm guessing the 02 sensor is getting weak. About 97K miles on the original. Maybe the CI-4 oils are putting deposits on the sensor? Are there any additives that will clean an O2 sensor?
To clarify, the engine is not running "poorly". Plenty of smooth power and it starts just fine. Also, zero oil consumption over 3-4K miles. A 2-3 mpg drop during Dec. and Jan. is not that bad. I've just had a little buzz type vibration at hot idle for a couple months now. Basically the same period that the Mystik oil has been in the pan.quote:
Well you did not post that the engine was running poorly also
As stated in the first post, 94 Toyota pickup(22RE).quote:
I don't know what kind of car you drive.
Motorbike:quote:
Originally posted by Motorbike:
Well you did not post that the engine was running poorly alsoquote:
Originally posted by toyvwbenz:
Motorbike,
I don't think my recent poor mileage is completely caused by the Mystik CI-4. The engine is not running quite as well as normal. I'm getting a bit of vibration at hot idle. I'm guessing the 02 sensor is getting weak. About 97K miles on the original. Maybe the CI-4 oils are putting deposits on the sensor? Are there any additives that will clean an O2 sensor?
Posted by heyjey :
Indeed, by using a good HDEO or thicker PCEO that reduces oil consumption, you will have less oil vapor passing through the system and the O2 sensor should last longer.
A thicker blend of base oils does not make for a better NOAK . Still going to flash off the lighter hydrocarbons with about any dino , does not matter how good the ring seal .
I'm not certain on all the HD 15w-40's but the Shell , Citgo and Mobil uses a portion of group I basestock still . More likely than not they all do .
All that has nothing to do with the volatility of the base oil and that was what I was speaking aboutquote:
Originally posted by heyjay:
Motorbike:quote:
Originally posted by Motorbike:
Well you did not post that the engine was running poorly alsoquote:
Originally posted by toyvwbenz:
Motorbike,
I don't think my recent poor mileage is completely caused by the Mystik CI-4. The engine is not running quite as well as normal. I'm getting a bit of vibration at hot idle. I'm guessing the 02 sensor is getting weak. About 97K miles on the original. Maybe the CI-4 oils are putting deposits on the sensor? Are there any additives that will clean an O2 sensor?
Posted by heyjey :
Indeed, by using a good HDEO or thicker PCEO that reduces oil consumption, you will have less oil vapor passing through the system and the O2 sensor should last longer.
A thicker blend of base oils does not make for a better NOAK . Still going to flash off the lighter hydrocarbons with about any dino , does not matter how good the ring seal .
I'm not certain on all the HD 15w-40's but the Shell , Citgo and Mobil uses a portion of group I basestock still . More likely than not they all do .
Look, I've been running HD equipment for almost 24 years.
A HDEO has certain basic requirements. It MUST, I repeat, MUST, reduce oil consumption. Why?
HD diesel motors were redesigned a while back to minimise blowby and particulate emissions. This was mandated by our "friends" at the EPA.
The primary change in HD diesel motors occured in the pistons. The Ring Land (The groves where the piston oil control and compression rings are located) and the Crown Land (The top of the piston, the squish bowl where the diesel is injected and compressed for compression combustion) were moved MUCH closer together.
In many cases, this distance was reduced to less than half before the mandated changes.
A poorly formulated oil and/or an oil with poor additive package performance broke down in the Top Grove. This left behind carbon/varnish deposits in the Top Grove of the piston.
The first noticeable symptom was the Top Ring stuck. This created massive oil consumption and really accelerated the deposit formation.
Once the Top Ring stuck/broke, the rest of the rings quickly had deposits and they also stuck/broke: massive oil consumption, lost compression, etc etc.
So HDEO are MANDATED to be less volitile, to keep oil consumption to an absolute minimum, and in that respect they have much more in common with ACEA A3/A5 oils.
HDEO are MANDATED in testing to keep Top Grove Fill at or below 15%. Volitility at or below 20%.
There is also the issue of soot. HDEO must control the massive soot loads now that the EPA has again mandated a change, so most HD diesel motors (Cummins ISX, etc) now run with EGR. All the soot that used to blow out the stack now ends up in the sump.
So the HDEO must also have much higher detergent/dispersant treat levels. In a new motor, this promotes a clean motor.
True, there is always a thin film of oil left behind in the cross-hatch, so a minimum amount of oil use can be expected. It's how the oil behaves in the Ring Land that determines which HDEO rating it receives.
Of course, you have HDEO that meet the spec, and HDEO that exceed the spec.
Used in a gasoline motor, especially from new, that "tractor oil" can be expected to keep the motor squeaky clean and oil consumption minimal.
Jerry
Sorry this thread has become so long I should have gone to the very top and looked at it again.quote:
Originally posted by toyvwbenz:
As stated in the first post, 94 Toyota pickup(22RE).quote:
I don't know what kind of car you drive.
I have adjusted the valves every 30K. Last one about a year ago. The truck really runs great. I will wait until summer mpg figures before I get serious about changing the 02 sensor. They run about $130.quote:
In addition to the points I previously mentioned, when was the last time you checked your valve clearance?
You have me stumped.quote:
Originally posted by toyvwbenz:
I have adjusted the valves every 30K. Last one about a year ago. The truck really runs great. I will wait until summer mpg figures before I get serious about changing the 02 sensor. They run about $130.quote:
In addition to the points I previously mentioned, when was the last time you checked your valve clearance?