WHAT TYPE OIL IS RECCOMMENDED FOR AN OIL CHANGE ON THE PLYMOTH VOYAGER WITH OVER 100,000 MILES

Contact your local Mazda dealer and ask them. Manufacturers all have different intervals for specific type of services and maintenance.

Some vehicles have a belt and others have a chain. In belts, most commonly are changed within 80,000 to 100,000 miles. With chains, as long as you maintain your oil changes up to date, no need to replace. But consider that hard driving affects the overall performance of this component.

Let's give this a shot... first is the question because the oil pressure light stays on when running? The first video tells how to accurately diagnose the pressure switch for fault (most common with Voyagers).
Auto Repair Maintenance How to Check if an Oil Pump Is Bad

The second is how to remove the oil pan to get to the oil pump if it is bad... this guy is just changing the gasket but the work is the same for your Voyager...
Replace oil pan gasket on 01 Dodge Caravan

And last, if it turns out to be just the sender as is most of the cases this next video shows how to change the sender unit on a Caravan which is a Voyager in sheep's clothing...
dodge caravan oil sending unit replacment

what size is the engine. I know that Chrysler had a problem with this happing on their 2.7 engine. Our 2000 sebring starting do this at about 80000 miles and I just drove it till I sold it with 165000.

Not a fuse or circuit breaker! Either you don't have enough Oil in the crankcase or your Oil pump is clogged or failing.

it is located inside the sump of the engine you need to remove the timing chain case and the sump to access it

3000 to 5000 miles

Here is the basic maintenance list for your Jeep:

~ Inspect lights and check tire pressure at least monthly or before & after each trail ride

~ Oil & filter change, chassis lubrication, differential and transfer-case fluids every 3,000 to 5,000 miles or 3 to 4 months - if you have recently crossed through water deep enough to submerge the centre of your hubs, replace the differential fluids as a precaution

~ Underhood belt and hose inspection every 3,000 to 5,000 miles or 3 to 4 months (every oil change)

~ Tire rotation and wheel balancing every 6,000 miles or every other oil change - driving offroad can knock wheel weights off a wheel, so you may need to have this done more frequently

~ Brake inspection every 6,000 miles or every other oil change - if you have rum brakes in the rear, ensure they are cleaned after each trail ride where you encountered deep mud/snow

~ Replace air filter every 12,000 to 24,000 miles or as indicated by inspection - dusty trails can shorten these intervals dramatically

~ Replace fuel filter every 24,000 to 100,000 miles

~ Automatic transmission service every 24,000 to 100,000 miles

~ Wheel alignment check every 12,000 to 24,000 miles or as indicated by tire wear - offroad driving can knock wheels out of alignment, so budget for an alignment every 3 months, then watch tread wear to see if it's needed

~ Cooling system flush and refill every 40,000 to 100,000 miles

~ Belt and hose replacement every 60,000 to 100,000 miles or 5 to 8 years

~ Engine timing belt replacement every 60,000 to 100,000 miles (when equipped) or 5 to 8 years

~ Air conditioning performance check annually, usually in the spring - be sure to run your A/C during the winter for brief period to ensure all hoses and valves stay lubricated and operable

kind of like a spark plug with 1 or 2 wires coming out of ther top

20w-50 is an excellent choice. Every 2,500 to 3,000 miles is recommended for oil change intervals.

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