Pennzoil's synthetic oil line is unique in that it's made with natural gas rather than crude. That base oil, according to the company, has fewer of the impurities found in the crude base other ...

As a fully synthetic clear 5W-30 oil made from natural gas, this pick can keep your snow blower engine up to 45 percent cleaner than standard oils. Pennzoil Platinum comes in 1-quart, 5-quart ...