In general, you always want to use the lightest viscosity of oil that will still be adequate for the conditions. Higher SAE numbers for oil indicate higher viscosity oils, meant for higher temperatures; use 10W-30 in cooler conditions or winter, and 20W-50 for warmer or summer conditions.
If the only thing wrong with the engine is the cylinder heads, yes you should replace just them, Getting a rebuilt motor is expensive and not needed unless the motor has been damaged beyond repair.
It's an engine with a cylinder volume of 1650 cubic centimeters.
its the cubic centimeters of the engine more ccs the bigger the engine
Engine capacitiy, cubic centimetres, the metric equivalent of cubic inches
If the motor is rebuilt I think that maybe a sensor wasnt connected
The engine displacement of the motor is 190 cubic centimeters (cc)
The 5.3L engine would equal aprox 327 cubic inches.
In a 1972 Ford Mustang : Either the 250 cubic inch , inline six cylinder engine , the 302 cubic inch V8 engine , or there were ( 3 ) versions of the 351 cubic inch V8 engine
415 cubic inch ( for the Ford 6.8 liter V10 engine )
That is 364 CID / cubic inch displacement. 6.0L engine.
the 3.7L Chevy motor is a 225ci
almost 44 cubic inches per engine cylinder