Anyone with a 4.0 or older motor needs to read this!! The flat tappet camshaft on a 4.0 or any flat tappet camshaft requires ZDDP (zinc) for wear protection and nearly ALL oil companies have removed Zinc from their oil because newer cars have roller cams and zinc was causing premature cat failure. Many Jeepers and Classic car owners including myself have been running Rotella T 15w 40. It's cheap and has the 1100ppm ZDDP that our beloved straight sixes need. There are a few other oils out there that have Zinc (Royal Purple is one) and also some additives (Lucas) but the Rotella seems to be the cheapest. Just thought I would share this so we can keep our jeeps running strong!!!!
I knew that. Also, Mobil Oil has replaced the zinc with some additive whose name is like 5 feet long that they swear totally replaces that element, and performs better than the older oils did in this regard.
Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .444"/.444" Lift, Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .600"/.600" Lift, Lunati Solid Roller Tappet Camshaft Solid Roller Ford SB 289 302 351W 510B5LUN, Lunati Hydraulic Roller Tappet Camshaft Chevy LT1 5.7L .560"/.565" Lift 60123, 1996 -1998 4.3 Liter 262-W/Marine (431-803186) Roller Tappet Camshaft, Generati, 1993 -1996 4.3 Liter 262-W/Marine (431-803186) Roller Tappet Camshaft, Swirl Po, 1996 -1998 4.3 Liter 262-W/Marine (431-803186) Roller Tappet Camshaft, Generati, 1993 -1996 4.3 Liter 262-W/Marine (431-803186) Roller Tappet Camshaft, Swirl Po, Lunati Hydraulic Roller Tappet Camshaft Chevy LT1 5.7L .447"/.471" Lift, Lunati Hydraulic Roller Tappet Camshaft Chevy SBC 327 350 400 .535"/.550" Lift, Thumpr Hydraulic Flat Tappet Camshafts OE Hydraulic Roller Camshaft For SB, Mutha Thumpr Hydraulic Flat Tappet Camshafts OE Hydraulic Roller Camshaft For SB, Big Mutha Thumpr Hydraulic Flat Tappet Camshafts OE Hydraulic Roller Camshaft Fo, Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .565"/.565" Lift, Lunati Solid Roller Tappet Camshaft Solid Roller Chevy BBC 396 454 .722"/.722", Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .500"/.510" Lift, Lunati Solid Roller Tappet Camshaft Solid Roller Chevy SBC .640"/.645" 50140SB, Lunati Solid Roller Tappet Camshaft Solid Roller Chevy LT1 5.7L .606"/.585", Lunati Hydraulic Roller Tappet Camshaft Chevy BBC 396 454 .625"/.625" Lift, Lunati Solid Roller Tappet Camshaft Solid Roller Chevy BBC 396 454 .804"/.755", COMP Cams Camshaft Custom Grind Street Roller Tappet Chevy Small Block Each, COMP Camshaft Mechanical Roller Tappet Adv Dur 300/304 Lift .672/.672 Ford 351W, COMP Camshaft Mechanical Roller Tappet Adv Dur 312/324 Lift .748/.720 Chevy BB, Lunati Solid Roller Tappet Camshaft Solid Roller Mopar Big Block RB 413 440, Isky Solid Roller Tappet Camshaft Solid Roller Chevy BBC 396 454 .640"/.650", Lunati Hydraulic Roller Tappet Camshaft Chevy LT1 5.7L .515"/.530" Lift 60121, Lunati Hydraulic Roller Tappet Camshaft BBC Gen VI 454 .595"/.612" Lift, Lunati Hydraulic Roller Tappet Camshaft Chevy LT1 5.7L .535"/.550" Lift 60122, Lunati Solid Roller Tappet Camshaft Solid Roller Ford SB 289 302 351W 50616, Lunati Hydraulic Roller Tappet Camshaft Ford SB 289 302 351W .571"/.587" Lift,
