1997 Toyota T100 - Truck seems harger to start. I have always been able to start the truck with the turn of the key immediately. At first it appears to be only with a hot start, now it appears to be harder at all starting times. Truck has 130,000 miles, starter changed approx. 3 years ago, complete tune up approx. 6 years. Last oil changed I ran ZMax through oil and gas. When running the truck, ttuvk runs great. Any suggestions? Thanks Marie

SOURCE: high oil consumption on 2001 Toyota Highlander- 3.0 V-6 engine

If you are using that much oil you either have a BIG leak or your BURNING oil through bad rings

SOURCE: ''O/D OFF'' SIGNAL ON THE DASHBOARD

The O/D off means your overdrive is off. Have you accidently bumped it? It could be the start of a problem with electrical system. Usually a bad ground on your O/D may cause this. Intermitten problems are the hardest to track down and fix. Do you know what overdrive does? It's a gas savings device which cuts the engine's RPM's down by something like 1/3, like a 5th gear. That's why you are experiencing the jerking on the highway. Do you have an owners manual? If not a good place to look for one is at a local salvage yard, or online even. There may be something in there to explain this to you a little better than I did. I had a frien who had a simular problem. It turned out to be a bad fuse. It wasn't blown, it was broken, and it's element would jiggle around when he would hit bumps in the road. I don't know if this helped you, but it will give you place to start looking.