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I bought a new car a year ago, and I've been running petroleum motor oil in it ever since. Could switching to AMSOIL new cause mechanical problems?
Switching from petroleum motor oil to AMSOIL (or even mixing the two, if the need arises) is perfectly safe. AMSOIL is 100 percent compatible with petroleum oils. Mixing AMSOIL and petroleum is not recommended (having petroleum motor oil mixed in detracts from the superior performance of AMSOIL), but there is no danger in doing so. Those who have been using petroleum motor oil in their mechanically sound vehicles can switch to AMSOIL safely. Petroleum motor oil and AMSOIL Synthetic Motor Oil are only incomparable in the way they perform, not incompatible.
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