Ken, Thanks for your response. Is there any real advantage to using synthetic over conventional? After all, isn't the powerglide bulletproof ? What don't you like about Mobil 1? Gail P. Policella Margate, FL Chapter # 333 South Florida Corvairs- Secretary 64 Deluxe Greenbrier with Camper Package 65 Monza Coupe/ 66 Corsa Convertible