i would use some royal purple or mobile 1 10-30 to 20-50 depending
Cadillac Northstar is a a type of motor car engine produced by the American compant Cadillac. Northstar engines can be found in Cadillac garages and via online websites.
If your Caddy is a 1992, it doesn't have a Northstar. They are in '93 and newer. Please determine the actual type of engine and repost your question.
I can't remember when Cadillac switched to 5w30 from 10w30 on the Northstar engine. Pop the hood and take a look at the oil cap, it will say right on it. GM was pretty good about putting oil weights on the cap.
The 2008 Cadillac Escalade has overhead valves (OHV).
The type of engine that can be built into a 97 Cadillac is the V8, 4.6 Liter, Transmission.
The best ignition wires for the Northstar are the factory recommended AC/Delco OEM replacements. Anything else and you're asking for trouble.
A '99 Caddy Northstar alternator. Available at GM dealers, or RockAuto on line.
The 2008 Cadillac SRX has double overhead cam (DOHC).
The 2008 Cadillac CTS has double overhead cam (DOHC).
According to Cadillac, your vehicle's engine requires a special oil meeting GM Standard GM4718M and are identified as a synthetic oil. SAE 5W-30 is best for your engine.
The 2008 Cadillac Escalade-ESV has overhead valves (OHV).
The 2008 Cadillac Escalade-EXT has overhead valves (OHV).