T4R2014
Elite Member
Do you use a Mobil 1 or Toyota filter?
Both good filters, but you won't notice a difference with either. The filter capacity means more if we're comparing brands that are actually worth anything. Frankly, you could just pretend you never even noticed the sludge and use some synthetic oil. You said you only saw buildup by the pcv valve right? Not the best indicator so I wouldn't jump to conclusions. You'll only know when the valve covers are off.