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  1. M

    04 Tacoma 240K - High varnish, some sludge was running T6 10-15K

    So I just finished replacing the valve cover gaskets and plug seals on the 2004 5VZFE Taco. I've been using Rotella T6 on about a 10-15K change schedule with a Toyota oil filter. My daily driving is 25 mins highway and about 40 mixed stop and go (traffic AM, vs PM) for 20 miles each way...
  2. M

    Rotella T6 5W40, 5000Mi, 1991 Ford 460 - RV

    Running Rotella T6 5W40 for the last couple changes. It's developed a lifter tick at idle after an hour or so highway driving. around 65-70 PSI, once there is just a little throttle opening, pressure goes to 80PSI, the bypass must open since it's a hard limit, maybe at first startup on a cold...
  3. M

    91 Ford 460 - noisy lifters at Idle when hot

    Time to switch from Rotella T6 5W40 to? Mobil1 15W50? My RV with 129K had been having a pretty load lifter tick when idleing after an hour or more highway driving. I've got a real oil pressure gauge on it ,so I can see it when the pressure gets below 65-70 PSI and the coolant is at 190F , just...
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