View Poll Results: What will the condition of my oil be after 10,000 miles?
Your oil will be just fine, you could probably go even more than 10,000 miles
26
56.52%
Your oil will be sludge, and you've ruined your engine
20
43.48%
Voters: 46. You may not vote on this poll
oil change ? (Merged with previous thread)
03-06-08, 06:50 AM
#107
Lexus Fanatic
Bichon is correct it is just the miles traveled. No sensors involved with most of Toyota cars.
My co-workers Acura RDX on the other hand is a different story. That actually has a sensor that compensates for driving style, distance traveled, outside temperture, and how long you wait before you turn your car off. The last is because it has a turbo charger that is fed oil from the engine.
He varies between 2500 - 4000 miles. His Acura doesnt have a oil maintence schedule in the owners manual.
Worst part is it required synthetic oil only or it voids the warranty. 
Glad I own a lexus, we can use conventional oil. I just changed to mobil1synthetic and got 2 more miles to the gallon.
My co-workers Acura RDX on the other hand is a different story. That actually has a sensor that compensates for driving style, distance traveled, outside temperture, and how long you wait before you turn your car off. The last is because it has a turbo charger that is fed oil from the engine.
He varies between 2500 - 4000 miles. His Acura doesnt have a oil maintence schedule in the owners manual.
Worst part is it required synthetic oil only or it voids the warranty. Glad I own a lexus, we can use conventional oil. I just changed to mobil1synthetic and got 2 more miles to the gallon.
03-06-08, 09:53 AM
#109
Lexus Fanatic
It is great that you drive so little on this car. I personally, would still change the oil every six months regardless of how low mileage is. Just be on the safe side. Moisture, dirt, unburnt gas (incomplete combustion) barometric pressure, etc can contribute to the properties in the oil to break dwon over time of idleness in a vehicle. Similar to those who store their cars in winter, most obtain an oil change shortly after to be safe. Things might be different for that Mobil 1 15k interval service oil. I used that in my gen1 but still changed the oil every 7k to be safe.
03-06-08, 10:14 AM
#111
I would go 6 months per oil change if you use conventional oil. If you use synthetic i would go 1 year. Synthetic usually suspense the contaminates better then conventional oil.
If you drive short trips and have low mileage for the entire year. Do it every 6 months and use conventional oil no need to spend $6 a quart.
For everyone else, just an FYI if you have an oil leak and use synthetic it will make the oil leak worse. found that out the hard way.
03-06-08, 11:52 AM
#113
Tech Info Resource
iTrader: (2)
Since this "new" thread covers ground we've seen before, I've merged with the most relevant old thread.
There is a tremendous amount of religion about oil. 4k OCI because you feel good is a waste of resources and unnecessarily increases the waste oil stream. OCI should be based on a reasonable analysis of your oil, not magic distances or time intervals.
Of great concern - oil is degraded by water and acids that are byproducts of combustion - not carbon. Short trips are the worst for an oil's service life because the humidity inside the engine condenses on the sides of the block when you start it up. This water drains down on top of the oil and brings with it dissolved organic acids related to combustion blowby. This is what destroys oil quickly. TBN - total base number - is a measure of an oil's life expectancy. The reason for this is there are organic base compounds added to the oil to neutralize the acids washed into the oil from the condensation process. Once the TBN is zero, the oil goes acidic and self destructs quickly.
Time does nothing to affect this. Short operating intervals do a LOT to affect this. Ideally, you should never operate your engine less than 20 minutes because in that 20 minutes you will raise the temperature of the oil sufficiently to boil off the water and suck the blowby vapors into the intake through the PCV system and purge the crankcase of the acids.
If you have fuel contamination in your oil (for those who would like to believe OCI is related to fuel consumption), your rings are bad and the engine needs a rebuild.
Calculated OCI is based on run time. Many short run intervals will result in earlier oil changes, and longer run intervals will result in longer change intervals.
So we can end the speculation here, and if you review this thread, it will definitely support the concept that your oil is being changed far more often that it should at 5k or even 7.5k. Our Blackstone OCI thread has results from a number of us showing a 10k interval is still shorter than it needs to be for many drivers, but again, if you are a city driver operating your car less than 10 minutes per trip, you will need to change your oil more often than someone who drives 30 minutes on the freeway every trip.
Last but not least, Mobile is a city in Alabama. Mobil 1 is a line of lubricants manufactured and sold by Mobil Oil Company.
There is a tremendous amount of religion about oil. 4k OCI because you feel good is a waste of resources and unnecessarily increases the waste oil stream. OCI should be based on a reasonable analysis of your oil, not magic distances or time intervals.
Of great concern - oil is degraded by water and acids that are byproducts of combustion - not carbon. Short trips are the worst for an oil's service life because the humidity inside the engine condenses on the sides of the block when you start it up. This water drains down on top of the oil and brings with it dissolved organic acids related to combustion blowby. This is what destroys oil quickly. TBN - total base number - is a measure of an oil's life expectancy. The reason for this is there are organic base compounds added to the oil to neutralize the acids washed into the oil from the condensation process. Once the TBN is zero, the oil goes acidic and self destructs quickly.
Time does nothing to affect this. Short operating intervals do a LOT to affect this. Ideally, you should never operate your engine less than 20 minutes because in that 20 minutes you will raise the temperature of the oil sufficiently to boil off the water and suck the blowby vapors into the intake through the PCV system and purge the crankcase of the acids.
If you have fuel contamination in your oil (for those who would like to believe OCI is related to fuel consumption), your rings are bad and the engine needs a rebuild.
Calculated OCI is based on run time. Many short run intervals will result in earlier oil changes, and longer run intervals will result in longer change intervals.
So we can end the speculation here, and if you review this thread, it will definitely support the concept that your oil is being changed far more often that it should at 5k or even 7.5k. Our Blackstone OCI thread has results from a number of us showing a 10k interval is still shorter than it needs to be for many drivers, but again, if you are a city driver operating your car less than 10 minutes per trip, you will need to change your oil more often than someone who drives 30 minutes on the freeway every trip.
Last but not least, Mobile is a city in Alabama. Mobil 1 is a line of lubricants manufactured and sold by Mobil Oil Company.
03-06-08, 02:10 PM
#114
Lexus Fanatic
Since this "new" thread covers ground we've seen before, I've merged with the most relevant old thread.
There is a tremendous amount of religion about oil. 4k OCI because you feel good is a waste of resources and unnecessarily increases the waste oil stream. OCI should be based on a reasonable analysis of your oil, not magic distances or time intervals.
Of great concern - oil is degraded by water and acids that are byproducts of combustion - not carbon. Short trips are the worst for an oil's service life because the humidity inside the engine condenses on the sides of the block when you start it up. This water drains down on top of the oil and brings with it dissolved organic acids related to combustion blowby. This is what destroys oil quickly. TBN - total base number - is a measure of an oil's life expectancy. The reason for this is there are organic base compounds added to the oil to neutralize the acids washed into the oil from the condensation process. Once the TBN is zero, the oil goes acidic and self destructs quickly.
Time does nothing to affect this. Short operating intervals do a LOT to affect this. Ideally, you should never operate your engine less than 20 minutes because in that 20 minutes you will raise the temperature of the oil sufficiently to boil off the water and suck the blowby vapors into the intake through the PCV system and purge the crankcase of the acids.
If you have fuel contamination in your oil (for those who would like to believe OCI is related to fuel consumption), your rings are bad and the engine needs a rebuild.
Calculated OCI is based on run time. Many short run intervals will result in earlier oil changes, and longer run intervals will result in longer change intervals.
So we can end the speculation here, and if you review this thread, it will definitely support the concept that your oil is being changed far more often that it should at 5k or even 7.5k. Our Blackstone OCI thread has results from a number of us showing a 10k interval is still shorter than it needs to be for many drivers, but again, if you are a city driver operating your car less than 10 minutes per trip, you will need to change your oil more often than someone who drives 30 minutes on the freeway every trip.
Last but not least, Mobile is a city in Alabama. Mobil 1 is a line of lubricants manufactured and sold by Mobil Oil Company.
There is a tremendous amount of religion about oil. 4k OCI because you feel good is a waste of resources and unnecessarily increases the waste oil stream. OCI should be based on a reasonable analysis of your oil, not magic distances or time intervals.
Of great concern - oil is degraded by water and acids that are byproducts of combustion - not carbon. Short trips are the worst for an oil's service life because the humidity inside the engine condenses on the sides of the block when you start it up. This water drains down on top of the oil and brings with it dissolved organic acids related to combustion blowby. This is what destroys oil quickly. TBN - total base number - is a measure of an oil's life expectancy. The reason for this is there are organic base compounds added to the oil to neutralize the acids washed into the oil from the condensation process. Once the TBN is zero, the oil goes acidic and self destructs quickly.
Time does nothing to affect this. Short operating intervals do a LOT to affect this. Ideally, you should never operate your engine less than 20 minutes because in that 20 minutes you will raise the temperature of the oil sufficiently to boil off the water and suck the blowby vapors into the intake through the PCV system and purge the crankcase of the acids.
If you have fuel contamination in your oil (for those who would like to believe OCI is related to fuel consumption), your rings are bad and the engine needs a rebuild.
Calculated OCI is based on run time. Many short run intervals will result in earlier oil changes, and longer run intervals will result in longer change intervals.
So we can end the speculation here, and if you review this thread, it will definitely support the concept that your oil is being changed far more often that it should at 5k or even 7.5k. Our Blackstone OCI thread has results from a number of us showing a 10k interval is still shorter than it needs to be for many drivers, but again, if you are a city driver operating your car less than 10 minutes per trip, you will need to change your oil more often than someone who drives 30 minutes on the freeway every trip.
Last but not least, Mobile is a city in Alabama. Mobil 1 is a line of lubricants manufactured and sold by Mobil Oil Company.
03-06-08, 03:36 PM
#115
Driver School Candidate
Join Date: Sep 2007
Location: California
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Great Idea on trying this!! I am very interested in finding out the results.
I went about 1.5 years and 15,000-20,000 on my 97 Honda civic without changing the oil and the car still runs like a champ today with over 90,000 miles on it. Oil changes every 5000 miles are overrated with todays engine technologies. Although I must say I will be changing the oil every 5000 miles now that I have a Lexus.....Im such a hypocrite.....
I went about 1.5 years and 15,000-20,000 on my 97 Honda civic without changing the oil and the car still runs like a champ today with over 90,000 miles on it. Oil changes every 5000 miles are overrated with todays engine technologies. Although I must say I will be changing the oil every 5000 miles now that I have a Lexus.....Im such a hypocrite.....
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