Crossword puzzle clue "helping engines run better longer since 1954 product"

Here are the possible solutions for helping engines run better longer since 1954 product clue

Answer
Clue
Relevancy
stp
Clue
"Helping Engines Run Better Longer Since 1954" product
"Helping Engines Run Better" sloganeer
testbed
Clue
Where engines take a trial run
era
Clue
Shot clock ___ (NBA period since 1954)
Definition
a main division of geological time
facethenation
Clue
Sunday morning show since 1954
hrtonhearsawh
Clue
Classic kid's book since 1954
millebornes
Clue
Popular card game since 1954
oriole
Clue
American Leaguer since 1954
Definition
any of various mainly tropical Old World passerine birds, noted for the melodious song and brilliant plumage of the males

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