Not all oil changes are created equal!
Have you ever actually wondered what is inside an oil filter? Well, you're not the only one. One of our techs recently pointed out that the Subaru OEM oil filter felt much heavier than an aftermarket on he had just removed. Being the curious type, he cut the aftermarket filter apart, as well as a used Subaru OEM filter. The results were actually quite surprising. The OEM Subaru filter contained over 60% more filter material. Not only that, but the aftermarket oil filter did not contain the special anti-drainback valve that the OEM filter contains. This valve is important because when the engine is shut off, the valve closes, keeping the oil in the engine, rather than allowing it all to drain back down into the oil pan. This helps eliminate dry starts, which can prolong engine life.
Since this initial experiment we have cut open filters from 5 different manufacturers and found that none of those have had the special valve, and none of them had as much filter material as the Subaru filter.
Does Your Battery Look Like This?
This customer brought their car in complaining of sluggish starts. There was so much corrosion that our technician was frankly surprised that the car could start at all. This was caused by a leaky battery and a bad engine ground.