Quote:
Originally Posted by 300Turbo
My last job was a lubrication chemist. I am no expert but did learn a lot about motor oils. Unless one is driving under severe conditions , such as a desert or north pole, synthetic will be a waste of money. The oil molecule may not break down, but the additives that make the engine last for thousands of miles are depleted after a while, plus the buildup of contaminants. By the way, the W as in 10W-40 means winter viscosity, not weight.
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Fully agreed, thats why I use HDEO Delo 400 or Delvac Super, they represent the best value to me price and performance wise and I can afford to change them at 5000 miles interval as well for all my vehicles.