Michael, you are entitled to your opinion but as a certified lube engineer my statements are based on facts. 30 + years in the business of supplying anything slippery or liquid for vehicles, manufacturing ,etc has taught me to work with proven ideas, not speculation. my customers trust me to supply them with the right products to keep the equipment rolling or the plants producing. down time is money just the same as down time of a tiger engine is money and that would also be frustration for the owner. why take chances of something going wrong? better safe than sorry. we'll discuss synthetics later but i see your knowledge of synthetics is limited.