Huh?
Finding grinding opening for white

Umm... well, let's see... What do you find difficult to play against? And what kind of opening do your typical opponants play?
Try to play 1.d4 and I'm sure that you can get some good 'grinding' endgame positions and also some very nice games were the tactics are real. Obviously you will need to learn the basics beind 1.d4 and common responses to it.
You can always try play d4 in the french (1.e4 e6 2.d4 and usually my opponent goes d5 and then 3.exd5) where almost ALL the games I play in that opening go into a 'grinding' endgame and if for once you would like to create an attack play c4 to open the position up. Again you will need to learn the basics.
Thank you.. So d4 is a decent opening me and my style?
Yes 1.d4 suits you as you say your the type of player who would 'grind' until endgame. But 1.d4 is for everyone because you can play some lines that suit the type of player who would 'grind' down their opponent through accurate play and endgame knowledge and there are some lines in 1.d4 openings that make the game extremely fun and tactical where one move means a loss.

Ridiculous.. OP you're rated around 1000, the only opening you should know about is the Italian game.
Whoever told you you're going to improve by studying opening theory is sadly mistaken. I'm not disparaging or making fun of you, I'm just trying to help. What do you mean by a grinding opening, anyway? Someone above interpreted it as an opening that could lead to a grinding endgame. Only a few openings lead to a specific ending (e.g. the Berlin defense) but those are main lines that your opponents are very unlikely to know. You're much better off working on your tactics and learning endgames. Just my 2¢.
I guess I've been playing the Italian opening for a long time and never knew it.
I used to play with a neighbor who was a math genius from U.C. Cal. Berkeley and knew chess theory. Whenever we played he told me how poorly I was playing and usually said my logic was akin to simply moving wood. He was 100% correct all the way until I moved the last piece.
Al hunt, Genius and throughly unhappy.
I normally play until the endgame win or lose with a couple of pawns. Plz help me find a decent grinding opening for my tornament on Thursday.