This place seems to try to steer folks needlessly to "synthetic" oil. I do not like being lied to, was told that I need it for my warranty, and then was told that I have to bye it, when I specifically ask for API 5-30, because they automatically assume I assume synthetic, API 5-30. The assumption should be be conventional, not synthetic. I brought them a coupon for the conventional oil and they forced me to pay for synthetic.