Briggs & Stratton100170 Vanguard 15W-50 Heavy Duty Synthetic Oil, 5 Quart

Excellent synthetic oil for small engines! The 15W-50 viscosity provides smooth cold starts and superior high-temperature protection. My Vanguard engine runs quieter and cooler with less wear. The 5-quart size is convenient for multiple changes. Trusted Briggs & Stratton quality—highly recommend for lawn mowers, generators, and other heavy-duty equipment. Five stars!

It performs exceptionally well under heavy-duty conditions, keeping my engine running smoothly. The 5-quart size is convenient and economical.

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.

It keeps the engine running efficiently, and I notice a difference in performance. The synthetic formula helps extend the engine's life, and I haven't had any issues since using it.

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

This was a great product at a reasonable price. The only problem I had was when I opened the box. There was a little bit of oil in the box and on the packaging. It seems like the bottle was leaking from the cap not enough for me to send it back, but enough for me to not buy from the same seller again it was a nice amount of oil, but like I said not enough for me to send it back .

The only oil specified for use in my Grasshopper Mower to maintain the warranty. Arrived way faster than I expected and ON SALE at this time of year so I ordered TWO just to be prepared for next year's mowing season. Having the right oil and filters specified by Grasshopper preserves my expensive equipment. Because this oil is 100% SYNTHETIC it runs clean and lasts beyond recommended oil change intervals. It is one less worry for me and that's priceless.

High-performance synthetic, 15W-50 protection