Originally Posted by Impatient
Bumping the thread to acknowledge some interesting twists this has taken with the premium fuel recommendation. OA has agreed to retest the sample, though I doubt this will "fix" the problem. I will look into the premium fuel aspect; after all, I've been running premium in the Subaru, at mfgr's recommendation. So what if this costs an extra $400/yr.🤬. I am hoping the lead is an anomaly. There are several ways to keep the oil more robust. Castrol-, Mobil-, or Pennzoil-Euro might also help a tad with starting viscosity, although it is debatable if I should deviate from Ford recommended spec. They don't allow for anything thicker than 5w30 in the manual (for the EB). I suppose I could argue that the Pennzoil 5w30 is just as good/better, but I had hoped to keep this rig for 120k+ miles, ie my goal is far beyond getting to the 60k warranty expiration. Maybe 5w30 is just not good enough.
Impatient, maybe try QSUD 5w30 I believe it conforms to the Ford spec, it is also Dexos1 gen2 sn plus. Viscosity @100c is 11.64, VI 170, with higher than normal Moly. This paired with a premium grade gas may help with the fuel dilution and hopefully bring down the lead level somewhat also. Try a 5k run with this combo and another UOA. You seem intent on using a 5w30, so this is why I didn't recommend a 40 weight. Stay the course a little longer and just maybe things will look up.. Fingers are crossed, good luck.
Bumping the thread to acknowledge some interesting twists this has taken with the premium fuel recommendation. OA has agreed to retest the sample, though I doubt this will "fix" the problem. I will look into the premium fuel aspect; after all, I've been running premium in the Subaru, at mfgr's recommendation. So what if this costs an extra $400/yr.🤬. I am hoping the lead is an anomaly. There are several ways to keep the oil more robust. Castrol-, Mobil-, or Pennzoil-Euro might also help a tad with starting viscosity, although it is debatable if I should deviate from Ford recommended spec. They don't allow for anything thicker than 5w30 in the manual (for the EB). I suppose I could argue that the Pennzoil 5w30 is just as good/better, but I had hoped to keep this rig for 120k+ miles, ie my goal is far beyond getting to the 60k warranty expiration. Maybe 5w30 is just not good enough.
Impatient, maybe try QSUD 5w30 I believe it conforms to the Ford spec, it is also Dexos1 gen2 sn plus. Viscosity @100c is 11.64, VI 170, with higher than normal Moly. This paired with a premium grade gas may help with the fuel dilution and hopefully bring down the lead level somewhat also. Try a 5k run with this combo and another UOA. You seem intent on using a 5w30, so this is why I didn't recommend a 40 weight. Stay the course a little longer and just maybe things will look up.. Fingers are crossed, good luck.