How often should I change my Engine oil and filter?
How often should you have your oil and filter changed? The answers are all over the place, most mechanics and auto repair centers tell you 3 months or 3,000 miles, some dealers say 5,000 miles ,while your owner’s manual may indicate your vehicle is fine for 7,500 miles or even more.
Who should you listen to, and what is best for your vehicle? Well, here is some information for you to consider.
One fact that we all can agree on is the importance of regular oil changes to prolong the life of your engine. But just how regular oil and filter changes need to be varies due to several factors.
First to consider is driving conditions, from normal to severe and everything in between. Toyota, Lexus, Honda, and Acura and most other vehicle owners manuals usually have two different maintenance schedules based on these definitions :
a) Normal- allowing for less frequent servicing.
Normal driving conditions – are trips over 10 miles, lightly cruising at moderate temperatures and loads, in a relatively clean-air environment. If your driving habits fit this category, you may not need your oil changed as often.
b) Severe- requiring heavier service.
Severe driving conditions- consists of short or frequent trips less than 10 miles, extreme outdoor temperatures, stop-and-go city driving or extensive idling in traffic, towing or heavy loads, and a dusty or polluted environment. If any of this description fits your driving profile, then your engine would require more frequent oil changes.
Many drivers tell me, “I don’t drive all that much, only around town,” assuming that they are in the normal or even lighter category. However as you can see by the above definitions, that simply is not true.
5,000 mile intervals- premature engine failure!
Toyota and Lexus paid out millions of dollars in warranty repair costs recently, related to engine failure and severe engine damage due to vehicle owners following the 5,000 mile oil change rule under all climates and driving conditions.
How do these driving conditions affect the engine oil? Driving in extreme climates, hot or cold, under heavy loads, or stop and go traffic, requires more fuel and this excess fuel can result in unburned fuel slipping past the engine piston rings, and contaminating the oil. Additionally normal condensation in the engine crankcase does not sufficiently burn off when the engine is not allowed to reach and/or stay at operating temperature due to short driving trips. This moisture accumulation causes sludge or oil gelling buildup over time, which causes gradual damage to the engine.
Now here’s some figures that may be of interest. Based upon driving 100,000 miles, following the 3,000-mile interval will cost you on average $600 – $900 total. Increasing the interval to 5,000 miles decreases total cost to $400 – $500. Then to 7,500 mile interval oil changes cost to about $250 – $325. The greatest possible savings are $650 which, when divided over an 8-year period, averages out to a little more than $6 per month, extremely low-cost insurance for a $6000 replacement engine.
For most of us, due to driving and climate conditions, the best rule of thumb is 3 months or 3,000 mile oil and filter change intervals when using a good original equipment oil filter and good quality standard oil. If 4 or 5 months and 5,000 miles fits better into your busy life style then switch to full synthetic oils. Keep in mind that in addition to the oil change a good service center is doing the vehicle health check-up, along with lubrication of chassis, top off of fluids, and necessary adjustments as part of the service. All of this leads to a longer lasting vehicle, problem free driving experience, and increased resale value of your vehicle.
For those of you who are looking at the “green” aspect of extended oil changes, keep in mind that 96% of oil drained from motor vehicles and even the oil filters are recycled.
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