Do We Really Need To Switch Our Vehicle Over To A High Mileage Oil At 75,000 Miles

What Is High Mileage Oil?

What Is High Mileage Oil?

High mileage motor oil is generally a synthetic blend with additional additives to "recondition" your seals. If your seals need reconditioned like the commercial says they do then what put them in this condition to begin with? Could it possibly be the oil they sold you when your car was new. If they are adding special additives that prohibit the oil from burning off then why not just add this additive to there regular oils.

How Do These Additives Work?

That is a very good question. Unfortunately, there is no readily available answer. There are many theories floating about but, with the exception of whoever does the actual designing and blending of the oils, no one seems to know, and those guys aren't telling. It's not even clear exactly what it is they are adding to the motor oils to perform these tasks.

How Does One Know If Their Car Needs High Mileage Oil?

According to the oil manufacturers, it is generally suggested that you use high mileage oil in any car with an engine that has over 75,000 miles on it. This claim is interesting for a few reasons. For one thing, it's an oddly concrete number considering car manufacturers vary widely on how often you should change your engine's oil. If you look at the directions on the bottles of the few manufacturer's that say how often you should change your oil, they almost always tell you to refer to the owner's manual. Excellent idea. Remeber, car manufacturer's simply give you the minimum spec of oil to use in your car and that's why we are being sucked into changing our oil so often. You should never be using anything less than that, anyway. Most modern owner's manuals go up to 200,000 miles. So, at what point does your owner's manual say to begin using "high mileage" oil. I'm betting it doesn't.

Conclusions

The consumer is faced with making a decision using very little facts. The oil companies don't tell us why they figure a high mileage engine needs different oil, and they don't tell us how it does what it does so that we can draw our own conclusions. The 75,000 mile recommendation to switch to high mileage is simply a random figure the oil companies came up with and nothing more. However, that flies in the face of their recommendations to change the oil at the intervals suggested by the manufacturers. So either the oil companies feel that the manufacturer's schedule is not adequate, which begs the question of why are they not telling us what is adequate to keep this so called seal damage from occurring in the first place, or they're just hoping we'll take their word for it and unquestioningly spend the extra money on the "high mileage" version of the same oil that they claim was already doing a good job of keeping your seals in good shape.

by: Steve Tarini

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