Recycled oil
Does anyone know for a fact if wallmart synthetic oil uses recycled oil or is it virgin oil? Many thanks
Forum Discussion
Can someone respond and post a link to an unbiased report about any purported benefit of using synthetic motor oil? I blanched when I first read hype about synthetics, not that they weren't good lubricants, but rather justifying their significantly higher cost by claiming (outrageously) long intervals between oil changes. The word outrageously is bracketed because the word is my opinion.
My rationale goes like this...no matter how conscientious an owner may be, air filters can never trap 100.00% of particulate matter entering the engine. Filter media can stop a great percentage but not all contamination. I even apply silicone grease to help seal an air filter, but after 5-7,000 miles I can open the cannister and rub my finger across a previously wiped with alcohol (meaning absolutely sterile) section of the air intake plenum and rub my finger across my lip. It is grit I feel, albeit powder. How much has passed into the engine?
How much grit has passed the intake valves and ended up on cylinder walls and migrated past the piston rings and entered the lube oil? I don't know. But I do know engine oil filters can filter only down to "X" microns and that's it. I try and use Baldwin filters but they cannot filter 100%.
So grit builds up and a filter is helpless to contain it. The standard remedy is to flush out contaminated oil and replace it. But the synthetics say this is not necessary.
Yes I am aware of hydrocarbon production of acids due to interaction of petroleum gasoline with petroleum lube oil. But for the life of me I have never had to rebuild an engine that was corroded. Only worn out.
Are there factual tests that -prove- alcohol ester based lubricants lubricate better at day in and day out temperatures? SAE test data? I am aware of how a synthetic may provide much superior lubrication at extremely low temperatures during engine start up.
But I do not have cold temperature start up issues. Only concerns with grit contaminating the oil. If I switch to a synthetic and continue to change oil at 4,000 miles, how do I justify the aggregate increase in expense for synthetic? It's 200,000 miles divided by 4,000 mile increments. Fifty oil changes with a cost difference of around thirty dollars. One thousand five hundred dollars.
What does the one thousand five hundred dollars buy me?
My rationale goes like this...no matter how conscientious an owner may be, air filters can never trap 100.00% of particulate matter entering the engine. Filter media can stop a great percentage but not all contamination. I even apply silicone grease to help seal an air filter, but after 5-7,000 miles I can open the cannister and rub my finger across a previously wiped with alcohol (meaning absolutely sterile) section of the air intake plenum and rub my finger across my lip. It is grit I feel, albeit powder. How much has passed into the engine?
How much grit has passed the intake valves and ended up on cylinder walls and migrated past the piston rings and entered the lube oil? I don't know. But I do know engine oil filters can filter only down to "X" microns and that's it. I try and use Baldwin filters but they cannot filter 100%.
So grit builds up and a filter is helpless to contain it. The standard remedy is to flush out contaminated oil and replace it. But the synthetics say this is not necessary.
Yes I am aware of hydrocarbon production of acids due to interaction of petroleum gasoline with petroleum lube oil. But for the life of me I have never had to rebuild an engine that was corroded. Only worn out.
Are there factual tests that -prove- alcohol ester based lubricants lubricate better at day in and day out temperatures? SAE test data? I am aware of how a synthetic may provide much superior lubrication at extremely low temperatures during engine start up.
But I do not have cold temperature start up issues. Only concerns with grit contaminating the oil. If I switch to a synthetic and continue to change oil at 4,000 miles, how do I justify the aggregate increase in expense for synthetic? It's 200,000 miles divided by 4,000 mile increments. Fifty oil changes with a cost difference of around thirty dollars. One thousand five hundred dollars.
What does the one thousand five hundred dollars buy me?
