I purchased 3 Gallons of this Valvoline oil to blend with some Valvoline 5W-30 conventional mineral oil for a summer oil change in HOT Florida. This Valvoline Premium Blue is rated API-SM, CJ-4 which allows me to use it in a gasoline engine. I have an older SUV that calls for 5W-30 or 10W-30 for year round use and this oil has a thicker viscosity to protect in the extreme heat and humidity on long, sustained, high speed highway runs as well as idling in traffic jams and short trips.....all classified as SEVERE DRIVING situations. Valvoline makes a Premium Blue in 10W-30 and a Full Synthetic in 5W-40 for Diesel and mixed fleet applications, like the 15W-40 that I purchased, but it is not readily available at the retail level for consumers. I am very pleased with the performance of the Valvoline 15W-40, Premium Blue for Sheer Stability and very strong detergents to keep my engine clean under all severe driving conditions. However, I wish that the other Valvoline Diesel Oils were available to be purchased on the retail level....especially walmart.com. Shipping from Walmart.com was very Fast, Carefully packed and it was Free since this product was not carried in any of the local Walmart stores withing 100 miles of my home. I hope Walmart will carry the other Diesel Oils from Shell, Valvoline, Mobil and Castrol in the 10W-30 conventional weight and the 5W-40 in the full synthetic weights. If Walmart.com did carry these oils in other weights, word would get out fast and that would give more people an opportunity to try these great oils from Valvoline and other oil companies.
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