My girlfriends 04 sadona is spuddering an bucking ... She just found out her EX-husband hasn't changed the oil or filter in over 100,000 mls ... Any ideas other then an heavy flush ???

Can't say that i have done that particular model, but they are usually located inside of the trans mission. You have to drop the pan.

In maintenance work a tune up would include new spark plugs, if is fitted with a distributor then replace the distributor cap and rotor. if your spark plug cables are old (more than 100,000 miles) may be good to replace them. replace air filter abd cabin filter. check the hoses that carry coolant. change oil and filter. It may be a good idea to change the coolant also to change the transmission oil.

sugar is hydrocarbon same chemistry as oil and fuel so it will mix in the oil ( make it a bit thicker)
coffee may not dissolve but will be held in suspension in the oil to be removed by the filter
so basically the contamination will go through the pump into the filter to be removed
So at this stage talk to several accredited service shops but I am thinking that drain the sump, change the filter
run the engine until hot then change the oil and filter again
collect a sample of the oil in a glass jar and look for contamination in the oil--it should be the same new color oil with no visible bits floating around
Maybe a second run till hot then again change the oil and filter
after that a filter change at say 1500 miles or a week to make sure that the filter is not blocking up
I feel that because it has not been run long that a flushing process using the grade of oil recommended along with frequent filter changes will most probably be the cheapest way to fix along with moving well away from the ex

Spark plugs, plug wires, and fuel filter. Pretty cheap, quick, and generally recommended around 100,000 anyways.

ITS VERY MESSY UNLESS YOU HAVE A BIG PAN TO CATCH ALL THE TRANNY FLUID, BRING IT TO A TRANNY SHOP INSTEAD, PAY SOMEWHERE FROM $75 TO $100

have found that be adding a product made by a company called seaform called motor tune-up, costs about 9 bucks put into your oil will clean the sludge & build up in engine, i have used for about 12 years now works great can also use to clean injectors, i would put 1 whole can in oil, drive about 30 days, then change oil & filter, on normal bases, i use 1/2 can in oil & 1/2 in fuel tank i do every 2 months

if over 100,000 miles change oxygen sensor/s have a scanner put on it to check for engine codes

The first change/flush will usually be at 75,000-100,000 mi.

found info