Can this be used in a 2003 ford 7.3L powerstroke?

Do not! When I recieved this bottle, I found written on the label specifically to not use in Powerstroke Diesel engines. This is not listed on Amazon. The reason it ahould not be used, is because your 7.3 is equipped with a HEUI system, and this formula can cause damage under such intense oil pressures. Professional diesel technician, speaking. Cummins and Powerstroke specialist.

Will this eliminate the blue smoke out of my vehicle?

Blue smoke indicates oil burning. The question is how is the oil getting into the combustion chamber. Most times it's due to valve seals, but it could also be due to worn cylinder walls, bad rings or a head gasket failure. 1. Valve seals problem solution. Replace the valve seals - could be an expensive fix. Or try some chemical to swell the seals, but it's not a permanent fix. 2. Worn cylinder walls solution. This could work, as long as the wear isn't too bad. Restore will fill in some of the scratches in the cylinder and reduce the blue smoke - maybe even eliminate it. 3. Bad rings solution. Try running some engine cleaner through the fuel - Seafoam is a good one to try. If the rings are sticking, you may get lucky and it could clear up the problem. 4. Head gasket solution. If there's no white smoke coming out, then only oil is leaking past the head gasket. The only fix is to replace the head gasket, which is costly. I hope this helps.

Manufacturer	Restore
Brand	Restore
Model	0016
Product Dimensions	7.01 x 7.01 x 22.91 cm; 453.59 g
Item model number	00016
Item Dimensions L x W x H	7 x 7 x 22.9 cm
Item Weight	454 g

Restore (00016) 8シリンダー方式 エンジン・リスターター潤滑剤 16オンス

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Restore (00016)　8シリンダー方式　エンジン・リスターター潤滑剤　16オンス