quote:An extended drain is an oil change that is beyond the manufacturer's recommendations. If you qualify for the "normal" maintenance schedule of 7,500 miles, an extended drain would be anything beyond that. If your driving practices put you on the "severe" maintenance schedule, an extended drain is an oil change interval beyond 3,000 miles. I used 3,000 and 7,500 mile intervals for illustration, as they are the most common. Might be different for you car. Check the owner's manual.
Originally posted by Gebo: What is your understanding of the term "extended drains?" How long is it? 10,000 miles, 15,000 miles, 20,000 miles,????
quote:Well, many new cars do have computer calculations based on engine time, rpm and speed, but many people are critical of that too! I know a guy who changes the oil on his Buick LeSabre when the indicator says 30% of its life is left. I asked him...do you throw out the milk carton when it is 2/3 gone? Sorry, but I don't get it! The funny thing is...he insists on using 5W30 because that is what the manufacturer recommends. So I ask...why is the manufacturer an expert when it comes to deciding what grade of oil to use, but an idiot when it comes to specifying the drain interval. Sorry, but again, I don't get it! [ June 10, 2003, 07:11 PM: Message edited by: CJH ]
Originally posted by unDummy: My definition doesn't even include the manufacturer since they are ignorant and still use mileage as the timer for oil changes. Actual time or fuel burned is/would/could be more consistent.
quote:Check out the UOA's, you will see many good reports above 5k and even 10-15k at times. Honestly, your wasting money if your only going to 5k on a syn lube, unless your racing the car very hard IMO>
trying to figure out why anyone would go past 5K, even with a synthetic. Seems like asking for trouble