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In Tejas, dino oils tend to break down at the higher temps that v-twin air cooled engines typically run at in the summer. That is the main reason true synthetics are used in this environment. Lots of people use dino oils in the Tejas heat, but for my money I want something that adds an extra 30-50 degree protection that synthetics offer. Beside that, I get a real kick out of paying somebody $10.00 a quart for synthetics.
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