Referring Clues

• "The Racer's Edge"
• Popular oil additive
• Indy 500 letters
• Nascar sponsor
• Race car sponsor
• Indy 500 sponsor
• Big initials at Indy
• 60's-70's hallucinogen
• Racing car product
• Oil additive
• Gas station product
• Fuel additive brand
• Product made by Armor All
• Big Nascar advertiser
• Indy 500 logo
• Big Indy 500 advertiser
• Oil treatment letters
• "The Racer's Edge" sloganeer
• Fuel additive
• Indy letters
• Initials on a Nascar car
• Engine additive letters
• Big name in auto products
• Car care product
• Racing initials
• Dura Lube alternative
• 500 letters
• Certain "edge"
• Indy sponsor
• Inits. at a gas station
• Pit stop can
• Sponsor at Indy
• Crankcase additive
• Letters at a Nascar race
• Engine-cleaning brand
• 500 letters?
• Its slogan is "The Racer's Edge"
• Race sponsor
• Big race sponsor
• Name on an oval
• Indy racer sponsor
• Popular fuel additive
• Product at a gas station
• Longtime Nascar sponsor
• Big letters in racing
• Engine additive brand
• Speedway letters
• Indy 500 advertiser
• Product with the old jingle line "One little can will keep you running free"
• Motor Up alternative
• Big inits. at Indy
• Big car racer sponsor
• Indy 500 inits.
• Engine additive
• 1999 Clorox acquisition
• Brand at a gas station
• Brand of octane booster
• Motor fuel additive
• Big initials in auto products
• One of racer John Andretti's sponsors
• Andy's auto additive
• Indy additive
• Oil additive letters
• Pit stop product
• Petty cash supplier?
• Gas additive
• Indy supplement
• Racing letters
• Gas tank additive
• Daytona 500 advertiser
• Sponsor of some NASCAR drivers
• Pit stop letters
• Oil additive since 1954
• NASCAR sponsor since 1970
• Havoline rival
• Gasoline additive
• Racetrack logo
• NASCAR supplier
• Pep Boys purchase
• Valvoline rival
• AutoZone purchase
• Petty cash source?
• Letters at Indy
• Brand of power steering fluid
• Maker of Son of a Gun! car care products
• Brand owned by Clorox
• Petty cash source, once
• Additive sold at Pep Boys
• NASCAR advertiser
• Gas additive brand
• Additive at Indy
• Auto maintenance letters
• Big name in auto additives
• It once had a jingle with the line "One little can will keep you running free"
• Longtime Richard Petty sponsor
• Engine performance aid
• 1985 Union Carbide acquisition
• NASCAR sponsor since 1971
• Gas treatment letters
• Auto-racing sponsor
• Clorox brand
• Auto-racer sponsor
• Motor-oil additive
• Valvoline alternative
• "The racer's edge"
• Motor oil additive brand
• Long time NASCAR sponsor
• Brand for a gearhead
• Big name at Indy
• Maker of fuel additives
• Brake fluid brand
• Indy initials
• Onetime sponsor of Richard Petty and Mario Andretti
• Octane Booster brand
• Lube letters
• Logo on many a Richard Petty race car
• Motor oil brand
• Auto additive
• Racer's sponsor
• "Interstate Love Song" band, for short
• Motor additive brand
• Winter Maintenance Formula maker
• Auto engine conditioner
• Engine oil additive
• Auto additives co. that hints at this puzzle's theme
• Oil-treatment letters
• Son of a Gun! Protectant maker
• Letters in a red oval
• Auto additive brand
• Auto-additive initials
• Motorsports brand
• The Racer's Edge
• Brand known as "the racer's edge"
• Talladega decal
• Racecar fuel additive
• Additive that sponsors NASCAR racers
• Sponsor at some NHRA events
• Big name in fuel additives
• Slick 50 competitor
• Motor oil additive
• Slick 50 rival
• Slick 50 alternative
• Indy inits.
• Brand of motor oil additive
• Popular additive
• Andy's additive
• NAPA buy
• Gas-tank additive
• 500 initials
• The racer's edge, commercially
• Auto engine additive
• Longtime sponsor in NASCAR events
• Popular fuel additive brand
• Auto additive letters
• Big inits. in fuel additives
• Auto oil additive
• Major NASCAR sponsor
• Logo seen on race cars
• Longtime sponsor of racing's #43 car
• Eng. conditioner
• Longtime Indy sponsor
• Big name in gas treatments
• Auto additive with a red oval logo
• Longtime auto racing sponsor
• Additive sold at AutoZone
• Part of the Armored AutoGroup
• Lucas Oil competitor
• Gas additive letters
• "The Racer's Edge" Indy sponsor
• Common Nascar letters
• ___ 500, annual race in Ridgeway, Va.
• Automotive brand with a red oval logo
• Logo seen at the Indy 500
• 'The racer's edge'
• Brand of brake fluid
• Motor treatment letters
• Letters on a track
• Longtime sponsor of Richard Petty
• Exorbitant
• Big Indy inits.
• Gasoline additive brand
• Initials seen at Indy
• Son of a Gun! vinyl protectant maker
• Motor oil choice
• Racetrack letters
• Pep Boys product
• Pit crew's canful
• Gas Booster brand
• It's the "Racers' Edge"
• Car care brand
• Oomph! degreaser brand
• Auto performance brand
• Brand of fuel additives
• lndy 500 advertiser
• Race car logo
• Brand of motor oil
• Ethanol fuel system treatment brand
• "The Racer's Edge" product
• "Helping Engines Run Better" sloganeer
• Havoline competitor
• Sprint Cup Series sponsor
• Letters on many a racecar
• Granatelli's additive
• Racer's brand
• Brand at the Daytona 500
• Auto. engine enhancer
• Inits. at Indy
• AutoZone brand
• Additive sold at Napa
• Eng. oil additive
• Initials on some Indy cars
• P.o. item
• Speedway brand
• Major race sponsor
• Big advertiser at auto races
• Prominent NASCAR sponsor
• Scott Weiland's band, for short
• NASCAR-sponsoring additive
• DeLeo brothers band (Abbr.)
• "Plush" rockers (Abbr.)
• "Wicked Garden" rockers (Abbr.)
• "Interstate Love Song" band, briefly
• Scott Weiland band (abbr.)
• Had smash debut "Core" (abbr.)
• "Purple" band (abbr.)
• Scott Weiland band, for short
• Scott Weiland "Purple" band (abbr.)
• "Interstate Love Song" band (abbr.)
• Brand advertised on many Nascar autos
• Talladega decal letters
• "The racer's edge" brand
• Indy car sponsor
• Letters on some Indy cars
• Big NASCAR sponsor
• 500 letters?
• Iconic Nascar sponsor
• Brand sold at Pep Boys
• Big engine additive
• Oil treatment brand since 1954
• Valvoline competitor
• Brand in a "non-friction best seller" ad
• Fuel additive known as "the racer's edge"
• Name in fuel additives
• Pennzoil competitor
• Brand that makes Gas Treatment and Octane Booster
• Auto additive with a mostly red oval logo
• Engine additive since 1954
• Additive sold at Napa Auto Parts
• Its early cans were labeled "Today's Modern Oil Treatment"
• It's "inside every great machine"
• Nascar additive
• Brand at a garage
• Indy brand
• Oil treatment brand
• Oil additive brand
• Common fuel additive
• NASCAR brand
• Gas treatment brand
• Big brand with an oval logo
• Pennzoil rival
• Frequent auto race sponsor
• Rival of Havoline
• Brand at the Indy 500
• Oil Stabilizer maker
• Fuel additive letters
• Common race-car decal
• Motor oil letters
• Popular gas additive
• Letters on many Nascar cars
• Pennzoil alternative
• Petty cash supplier?
• Brand sold at gas stations
• Popular engine additive
• Automotive brand with an oval logo
• Indy 500 initialism
• Longtime advertiser at the Indy 500
• Race car driver's additive
• Treatment for fuel injectors
• Big racing sponsor
• Garage brand
• Big speedway sponsor
• Canful at a gas station
• Brand seen at speedways
• Noted speedway sponsor
• Filling station brand
• Longtime sponsor of 8-Down
• Big name in motor oil
• Brand seen at AutoZone
• Pit stop brand
• Indy label
• Speedway additive brand
• Gas additive brand that's a longtime NASCAR sponsor
• Product known as "The Racer's Edge"
• Speedway sponsor
• Product with the additive zinc dithiophosphate
• Sponsor of auto racing's Sprint Cup Series