Now until August 31, 2016 Amsoil Signature Series is on sale for $12.00 plus taxes per quart.

AMSOIL Signature Series Synthetic Motor Oil is engineered to outperform conventional and synthetic motor oils. It combines industry-premier synthetic technology with AMSOIL premium additives in a unique formulation that exceeds the higher performance demands of modern engines. Signature Series delivers the performance and value upon which the AMSOIL reputation is built. The culmination of more than 40 years of expertise, its exclusive formulation raises the bar for motor oil performance. Signature Series is available in 0W-20, 0W-30, 0W-40, 5W-20, 5W-30, 10W-30, and 5W-50.

Signature Series 5W-50 is perfect for your Mustang GT with Track Pack, Boss 302, GT500, GT350, GT350R, and Ford GT.

Signature Series 0W-40 is perfect for your Challenger Hellcat, SRT, and R/T