Whenever I see residue in the bottom of oil bottles I assume that needed additives dropped out of suspension. Anyone know if certain additives are more likely to drop out, and if the reduction of additives due to dropping out is significant enough to matter?
I usually notice it as dark deposits in white, silver or grey bottles. One advantage from a manufacturers standpoint to having black bottles, customer service reps don't have to spend time on questions about it.
Back in the 70's I quit using a particular manufacturers oil because I was alarmed at the residue. Don't remember who it was.
I usually notice it as dark deposits in white, silver or grey bottles. One advantage from a manufacturers standpoint to having black bottles, customer service reps don't have to spend time on questions about it.
Back in the 70's I quit using a particular manufacturers oil because I was alarmed at the residue. Don't remember who it was.