Johnny Cash and ‘cousin’ for STP, 1978.

“Yeah, for my car – it’s STP.”

A Monday underway means it’s time to select a new year for this week’s 70s commercials. Let’s follow 1977 and roll right into 1978. That makes sense.

Here’s the great Johnny Cash in a spokesperson spot for STP oil treatment. The commercial aired in September of 1978.

Previously on 70s Spots: Daily 70s Spot #427, 428: Miller High Life Beer (1977)

More Johnny Cash at Bionic Disco: Johnny Cash for Lionel Trains