My guess is the spark plugs probably got oil on them and were fouled leading to misfires.
Reviews of VALVOLINE parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
4.0
Manufacturer Ranking
#74
352
Spare Parts
14
Country
USA
Spare Parts
I run Valvoline VR-1 20w50 in my '74. It is straight Dino oil but it has a higher amount of zinc in it which solid lifter cars like ours love.
Pros: higher amount of zinc
Valvoline max life kicks ass.
Pros: kicks ass
Vehicle:
Subaru
Valvoline max life kicks ass.
Pros: kicks ass
Vehicle:
Subaru
I'm using "Valvoline Modern Engine Oil" since they have patents and claim to have some chemistry there to keep the valve stems more carbon-free.
Pros: carbon-free valve stems
Just change it.
I have a Yaris with 300,000 miles on it. All I use is conventional 5-30 Valvoline.
Pros: cheap insurance
Vehicle:
Toyota Yaris
Mileage: 482803 km
I always use VR1 (Valvoline) 20w50. Excellent oil. The car runs beautifully on it and has had no issues.
Pros: excellent oil, no issues
Vehicle:
Porsche
I use the red bottle in mine. I've found that it leaks/burns the least.
Pros: leaks/burns the least
I have the VR-1 race oil on my MR2. Apparently some people said it made my car spit flames.
Vehicle:
Toyota MR2
Me personally I'm using Valvoline euro full synthetic 5w 30
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