As your local Authorized AMSOIL Dealer in La Mesa, Synthetic Oil Inc. is dedicated to providing the ‘Jewel of the Hills’ with the world’s best synthetic lubricants. Synthetic Oil has proudly served the entire San Diego metropolitan area for over 30 years. From the steep residential grades of Mount Helix to the heavy commuter traffic on the I-8 and Highway 125 interchange, our AMSOIL motor oils and filters are engineered to protect your engine against the high-stress demands of hilly terrain and stop-and-go driving. Beyond automotive care, we specialize in high-performance Marine, Motorcycle, and Off-Road lubricants, ensuring your boat, bike, or 4×4 is ready for the Pacific or the mountain trails. Shop online for factory-direct shipping straight to your La Mesa doorstep.