Copyright Ⓒ 2021 Petroleum Quality Institute of America, LLC All rights reserved.
Day: October 6, 2016
Motor oils recently examined by the Petroleum Quality Institute of America include three brands of SAE 5W-30 grades (Circle K, Quantum X-5, RPMaximum) and XCEL SAE 10W-40. The XCEL product tested raised eyebrows. And the reason it does is because the label on the XCEL product claims that this is a multigrade 10W-40 motor oil… Read More ›