ConocoPhillips added Kendall GT-1 Ultimate Synthetic Motor Oil to its existing line of Kendall motor oil. The company said this product is a premium full synthetic passenger car engine oil specially formulated to meet the stringent performance requirements of the GM4718M (Corvette) specification. It is also specified for use in most late model Cadillacs and all turbo-charged General Motors engines. Kendall GT-1 oil is available in two viscosity grades: SAE 5W-30 and SAE 10-W-30, both of which meet API SM/CF and ILSAC GF-4 performance requirements for new cars under warranty. The SAE 5W-30 viscosity grade also meets the performance requirements of the Honda HTO-06 standard for use in the Acura RDX.