Briggs & Stratton 100170 Vanguard 15W-50 Heavy Duty Synthetic Engine Oil, 5 Quart

I’ve been using the Briggs & Stratton 100170 Vanguard 15W-50 Heavy Duty Synthetic Oil in my equipment for a while now, and I am incredibly impressed! This oil provides outstanding engine protection, even under the toughest working conditions. I’ve noticed a significant improvement in engine performance—smoother starts, quieter operation, and overall better fuel efficiency. It’s specifically designed for heavy-duty use, and it really shows in how well it performs in my lawn mowers, generators, and other power equipment. The synthetic formula makes this oil incredibly durable, and I’ve experienced less wear and tear on my engines compared to regular oils. The 5-quart size is perfect for those larger engines, reducing the number of refills needed. This oil really helps extend the life of my machines, and I feel confident that I’m getting the best protection for my investment. If you’re looking for a high-quality, long-lasting oil for your heavy-duty equipment, I highly recommend the Briggs & Stratton Vanguard Synthetic Oil.

Best price i could find for the 37hp big block on my mower. This is on the factory list for best lubrication in a large temperature range. It works and is high quality. I think I may go with a slightly thinner oil after the warranty is up. Should get better fuel efficiency out of 10w40. The engine should run plenty col with thinner as well.

Top-notch oil, excellent engine protection, smooth performance, highly recommended!

High-performance synthetic, 15W-50 protection

Great product for a good price