I have an 86 Isuzu Amigo that started burning oil recently, about 1 quart every 200 miles. It has 186000 on it and I’ve always used 10W-30 Castrol in it. I did not want to rebuild the engine so I tried an oil additive to stop the burning problem and changed to a heavier grade 40W straight. It. After driving it about 500 miles it basically completely stopped burning oil! I found this advice in a forum and it seems to have worked. Many people claim they drive for years after the treatment without a problem. Something to think about before rebuilding your engine. I found an awesome car maintenance software program named Automotive Wolf Vehicle Maintenance Software. It tracks your car maintenance schedule and reminds you when anything is due. I’m using it for three different vehicles. I highly recommend it.