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There are many oils to choose from, but TLT readers give the nod to synthetic over traditional petroleum-based products-36% versus 9%. Most TLT readers choose synthetic oil because of its better protection, extremetemperature performance and longer fill intervals, while others choose traditional petroleum products for price considerations. Most readers suggest going by OEM recommendations when choosing oil. Readers differ significantly on the topic of how often to change oil. One notes, "It is important to change the oil and lubricate the vehicle, but less frequently than the manufacturer's recommendation is probably fine." Many readers stand by the traditional "every three months or 3,000 miles" rule, while at least one says that rule is bogus.
Synthetic because that has been prescribed by the car/ engine manufacturer.
Petroleum-based because of availability.
Synthetic-I have an understanding of the benefits to cold-weather and hot-weather performance. I watch for sales, and that helps to control the cost difference versus traditional.
Traditional, low cost.
Petroleum-based. Cost.
Part synthetic (dexos®).
Synthetic, as it's easy starting and best for extreme cold weather.
Synthetic due to life span.
Semi-synthetic so as to get the benefit of part synthetic without the cost of a full synthetic.
Synthetic, less wear and lower friction.
I try to use synthetic because this oil has the better oxidation stability, viscosity index, lower sulfur, etc.
Synthetic-based-OEM requirement.
Synthetic. Gives extra protection at higher temperatures and extended oil life. Also decreases my environmental footprint.
Synthetic. It came factory filled and recommended to continue and allows for more kilometers per change.
Petroleum-based because the car has an oil change reminder that I use, has a parameter to proceed with the oil change and is based on the performance of the engine using petroleum-based oil.
Synthetic because of its longevity and performance over time.
I favor synthetic based on Group III. I live in Canada and find it packs a good punch of performance enhancements (including low temperature) without PAO pricing.
Whatever the manufacturer put in the car. My cars are always under full warranty and it is to the manufacturer's advantage to use the best for the vehicle.
Synthetic-longer oil drain intervals and better protection.
Petroleum. Synthetics are overpriced for the advantages they provide with longer drain interval.
Just switched to synthetic...