2002 Jeep 4.0 with 160,000 miles. This winter I thought I would try full synthetic oil. Went with pennzoil platinum 5w30 HM. Filter Fran XG2 and one bottle of lubegard bio/tech.
The performance was amazing. At -30 full oil presure within 4 seconds. Last year was a nightmare with Valvoline SB 5w30 with Motorcraft filter. No presure for 10 seconds.
I am going to give the credit first to the Fram synthetic filter dome bypass compared to motorcraft celluloid filter and thread end bypass. Second to the oil. Read pdf on the pennzoil platinum 5w30 HM. -45 to -51 cold pour. I am sure the Fram filter went into bypass at those temps glad it did. Engine super clean so no worries there. The lubegard bio/tech probably helped. Where would you place the credit or was this just the right combination.
The performance was amazing. At -30 full oil presure within 4 seconds. Last year was a nightmare with Valvoline SB 5w30 with Motorcraft filter. No presure for 10 seconds.
I am going to give the credit first to the Fram synthetic filter dome bypass compared to motorcraft celluloid filter and thread end bypass. Second to the oil. Read pdf on the pennzoil platinum 5w30 HM. -45 to -51 cold pour. I am sure the Fram filter went into bypass at those temps glad it did. Engine super clean so no worries there. The lubegard bio/tech probably helped. Where would you place the credit or was this just the right combination.