Building Quality Diesel Fuel Tanks since 1982.

Allen-Jac has been in the trucking business for decades. Since 1982 we've built and re-built thousands of commercial truck diesel fuel tanks for owner/operators, fleet owners, and repair shops all over Sonoma County and greater California.

We use only the highest quality aluminum and other materials, and our team consists of experienced welders who know how to build strong, lightweight fuel tanks that will look great on your truck and give you great performance, mile after mile. We've built fuel tanks for every make and model you can imagine, including Mack, Peterbilt, Freightliner, Kenworth, Volvo, and more.