Rebuilt 4 cylinder 1969 Volvo B20 compression 10:1, first start . Question is which weight of Joe Gibb Break in Oil to use. It is offered in 5w30 and 15w50. The 15W50 is the original 5w30 is newer but no recommendations offered on their website all they say is that the lighter oil was formulated for tighter clearances. Any suggestions? Thanks, Rich B.
Joe Gibb Beak in Oil which Grade?
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5w30 so it pumps faster when started
+1
Product Features:
◦Same formula as original BR in a SAE 5w30 viscosity.
◦Petroleum oil provides the highest levels of zinc and phosphorus for flat-tappet engines.
◦Additive package promotes ring seal and provides maximum protection available for cams and lifters during initial break-in.
◦Requires no additional additives.
◦Good for tight clearance and/or low temperature break-in
◦Compatible with methanol and high-octane race fuels.
Applications/Instructions:
◦Specifically designed for breaking in engines and flat tappet camshafts and lifters
◦Good for tight clearance and/or low temperature break-in
◦Good for restrictor plate engines, drag race engines, and OEM rebuilds
◦Combined with Joe Gibbs Driven Engine Assembly Grease, BR30 provides the highest levels of protection for camshafts, lifters, wrist pins, distributor gears, push rods and valve retainers
◦Same formula as original BR in a SAE 5w30 viscosity.
◦Petroleum oil provides the highest levels of zinc and phosphorus for flat-tappet engines.
◦Additive package promotes ring seal and provides maximum protection available for cams and lifters during initial break-in.
◦Requires no additional additives.
◦Good for tight clearance and/or low temperature break-in
◦Compatible with methanol and high-octane race fuels.
Applications/Instructions:
◦Specifically designed for breaking in engines and flat tappet camshafts and lifters
◦Good for tight clearance and/or low temperature break-in
◦Good for restrictor plate engines, drag race engines, and OEM rebuilds
◦Combined with Joe Gibbs Driven Engine Assembly Grease, BR30 provides the highest levels of protection for camshafts, lifters, wrist pins, distributor gears, push rods and valve retainers
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