Skyliner70cc
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Old bob is a forum filled with great members like this one. Bob Is The Oil Guy (BITOG) began in May 2002 with a handful of participants and now the oil forums have over 34,000 registered members. Members include well-respected tribologists-its a big word so u may way to look it up-, chemists, and oil analysis professionals who regularly participate and contribute their knowledge and expertise. The website is about educating you so you can make informed decisions about the life blood of your engine: motor oil.
I recall following an oil longevity study that began in 2002. It compared several synthetic oil changes against each other and oil samples were pulled every 1000 miles to see how far the oil could go before it needed replacement. Google paradise garage oilstudy http://neptune.spacebears.com/cars/stories/oil-life.html to read up on it. If you have any intellectual curiosity you'll find yourself intrigued at the least.
here is a little snippit from that oil study
'To date we have completed our tests of Mobil 1 and Amsoil. Mobil 1 held on for 18,000 miles, and didn't need its first oil filter until 12,000 miles. For all the details, visit our Mobil 1 Test Results page. Amsoil was time-limited to 14,000 miles (its year ran out), but it made it the whole way without a replacement filter. It's not a total success story, though, as it had some trouble with its viscosity.'
Another observation from the oil study was that each time that the oil was changed, there occurred a spike/increase in the amount of engine wear metals in the oil cample pulled at the next 1000 mile oil sample. This effect has also been observed in 100's of oil sample analysis posted on bobistheforum guy forum leading some to speculate that too frequent oil changes can increase engine wear and that may be due to the new additives in fresh oil needing time to be 'activated' by heat and pressure
I forgot where i read it and wish i kept the link to the story about how many billions of dollars oil company's make by people changing their oil by a 100 miles sooner than called for. The 3k oil change interval spouted by advertises for iffy lube and other shops is just for greed and profit.
Yes, you are correct...I have never had to pull a sludged engine apart and rebuild it..because the info I gained from that website allowed me to become a better educated consumer and user of oil products just like the knowledge gained from this website has allowed me to do the same as a motorized bike user. I've been using using extended oil change intervals for almost 10 years now and never had an engine issue. European's have been ahead of the game with extended ocis and 2 of my engines are european made. the manufacturer of each engine and vehicle manufacturer state that oil change intervals are as follows; 1. for my 06 jeep liberty CRD 2.8 liter vm motori italian turbo charged engine 7,500 mile oil change interval for severe service and 10,000 mile oci for non-severe service. my 07 jeep grand cherokee with the mercedes 3.0 liter engine states that the severe service oil change interval is 8750 miles and non severe service oil change interval is 12,000 miles using low sap/esp oils. neither engine's turbo has failed yet and when i pulled the valve head assembly to replace a leaking valve cover gasket on my liberty last year....she was spotless inside with no varnish or sludge.
I recall following an oil longevity study that began in 2002. It compared several synthetic oil changes against each other and oil samples were pulled every 1000 miles to see how far the oil could go before it needed replacement. Google paradise garage oilstudy http://neptune.spacebears.com/cars/stories/oil-life.html to read up on it. If you have any intellectual curiosity you'll find yourself intrigued at the least.
here is a little snippit from that oil study
'To date we have completed our tests of Mobil 1 and Amsoil. Mobil 1 held on for 18,000 miles, and didn't need its first oil filter until 12,000 miles. For all the details, visit our Mobil 1 Test Results page. Amsoil was time-limited to 14,000 miles (its year ran out), but it made it the whole way without a replacement filter. It's not a total success story, though, as it had some trouble with its viscosity.'
Another observation from the oil study was that each time that the oil was changed, there occurred a spike/increase in the amount of engine wear metals in the oil cample pulled at the next 1000 mile oil sample. This effect has also been observed in 100's of oil sample analysis posted on bobistheforum guy forum leading some to speculate that too frequent oil changes can increase engine wear and that may be due to the new additives in fresh oil needing time to be 'activated' by heat and pressure
I forgot where i read it and wish i kept the link to the story about how many billions of dollars oil company's make by people changing their oil by a 100 miles sooner than called for. The 3k oil change interval spouted by advertises for iffy lube and other shops is just for greed and profit.
Yes, you are correct...I have never had to pull a sludged engine apart and rebuild it..because the info I gained from that website allowed me to become a better educated consumer and user of oil products just like the knowledge gained from this website has allowed me to do the same as a motorized bike user. I've been using using extended oil change intervals for almost 10 years now and never had an engine issue. European's have been ahead of the game with extended ocis and 2 of my engines are european made. the manufacturer of each engine and vehicle manufacturer state that oil change intervals are as follows; 1. for my 06 jeep liberty CRD 2.8 liter vm motori italian turbo charged engine 7,500 mile oil change interval for severe service and 10,000 mile oci for non-severe service. my 07 jeep grand cherokee with the mercedes 3.0 liter engine states that the severe service oil change interval is 8750 miles and non severe service oil change interval is 12,000 miles using low sap/esp oils. neither engine's turbo has failed yet and when i pulled the valve head assembly to replace a leaking valve cover gasket on my liberty last year....she was spotless inside with no varnish or sludge.
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