A Licensed AMSOIL Dealer Based in Underwood, WA

Underwood Synthetics is a proud AMSOIL Dealer- the leading brand in synthetic lubricants, fuel additives, and filters. We’ve partnered with AMSOIL because we believe in the quality of the product they offer and the difference it makes to those who want to take care of their vehicles. If you’re in search of online AMSOIL for sale, look no further than Underwood Synthetics. We have everything you need to keep your vehicle well maintained and running smoothly. When you need an AMSOIL dealer you can trust, come see us today.
Amsoil Synthetic oils are designed to:

  • Improve performance

  • Improve fuel economy

  • Reduce oil consumption

  • Increase engine life

  • Keep repair costs low

  • Make your vehicle easier to handle in cold weather

Synthetic oil is designed to give motorists the benefits of traditional oil, without all the negatives. Synthetic oil is safer for the environment, lasts longer, and is better for your engine than traditional oil. We decided to partner with AMSOIL because we believe they offer the highest quality synthetic oils at the lowest cost to the consumer. We want to help motorists protect their engines while keeping their monthly repair costs low. Synthetic oils from a reputable brand like AMSOIL can help keep your vehicle on the road longer yet allow you to change your oil-less. No other product gives you the guarantee that it will work so well, you’ll rarely have to come back for more. But AMSOIL is such an amazing brand, once you try it, you’ll want to sample all of their amazing products. From AMSOIL air filters to synthetic grease, we carry everything you need and more. Visit our website to see the full array of products we have to offer.
We have Amsoil products available for trucks, ATVs, snowmobiles, motorcycles, racing vehicles, and ever firearms. No matter what kind of synthetic lubricant you’re in the market for, we carry a product you’ll love. From antifreeze to air filters, if it’s related to vehicle maintenance, we carry it. We have AMSOIL Air Filters for regular vehicles as well are racing vehicles, so we have something for the average motorists and the pros alike. You won’t find a large collection of Online AMSOIL for sale anywhere else. So, head on over to Underwood Synthetics if you’re in the market for synthetic oils and feel like browsing the widest variety of products on the market.
We are a family business with over 30 years of experience selling AMSOIL and working with synthetic motor oil. We are the leading AMSOIL Dealer in Washington and we have one of the biggest selections of the brand's products available online. Follow us on social media to stay up today with everything we’re doing and feel free to reach out if you have questions or ideas.