The first thing that comes to mind is the catalytic converter plugging up after driving a short distance and clearing itself after sitting for a period of time. Take it to a muffler shop for an expert opinion. The plugging of the converter would cause a huge power loss and the resulting restricted exhaust gasses would cause your check engine light to come on since the oxygen sensor would be giving the computer bad information.
Discuss the frequency of oil change service for a light-duty engine used in a regular service application versus on in a severe service application?
The engine system urgent service indicator is a warning to turn the engine off immediately. Running the engine will result in severe damage.
You have a severe misfire. See related questions below.
Oil in the radiator indicates a possible severe problem, where coolant could also leak into the oil. Driving an engine in this situation at all could lead to severe engine damage.
Yes, it has an interference engine. Timing belt replacement recommended every 105K under normal driving conditions or 60K under severe driving conditions.
if it says "service engine soon" yes, there is a problem. probably not severe but it should be scanned for engine codes and repaired at the nearest opportunity.
I have 2006 Blazer. Antifreeze needs to be at right level or no heat. Instead of changing my thermostat for very cold temperatures I use a grill snap on guard that adds plenty of heat to the cab and is adjustable. Gasoline will not burn well if the engine is too cold in severe winter driving. If you are losing at lot of antifreeze use the copper sealer and not the aluminum sealers.
You can keep driving the vehicle if you want to destroy the engine. The more you run the engine the more damage will be done. Coolant mixing with the oil will cause severe engine wear.
The noun form for the adjective severe is severeness.
This could be a way of describing severe hesitation / engine misfiring. See "Related Questions" below for the basics of what to check for...
Of course you can, but the question is should you. The answer is, if you want to do some serious damage to the engine and eventually destroy it completely then keep driving it. Reason being is that the coolant will mix with the engine oil. This coolant is a poor lubricant and is very corrosive to engine bearings. it will cause severe engine wear. So stop driving this car immediately and do not drive it again until it is repaired.