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'04 HD
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52 Posts
Discussion Starter · #1 ·
I normally just get whatever Synthetic is on sale when I change my oil. Usually Mobil 1 or Castrol. Is there really a differnce, and does it hurt to change back and forth?
 

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GMFS founding member
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4,014 Posts
running different brands in a gas engine is OK, but i'd still stick with mobil1 if i were you. it's usually cheapest at walmart anyways.
 
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