Often the materials are based on a case that you will gain one skill point each craft. This won't happen, so you will have to buy a few extra materials while you are leveling your Outland Engineering.
If you are low on gold, I recommend you to try this Gold Making Guide, it can help you to make loads of gold.
If you are still leveling your character or you just started a new alt, I recommend you to use a leveling guide. You can level your character to level 120 in 8 days with this guide.
Approximate Materials Required:
- 294 x Fel Iron Bar
- 20 x Mote of Earth
- 10 x Mote of Fire
- 34 x Primal Earth
- 6 x Primal Fire
- 35 Netherweave Cloth
- 184 x Adamantite Bar
- 6 x Khorium Bar
Leveling Outland Engineering
Go to Outland and find Engineer Sinbei in Shattrath City, then learn Outland Engineering.
If you choose the Aldor faction during one of the Outland quests (or you are Draenei), then you can't interact with this trainer, you have to visit Technician Mihila in Shattrath City to learn Outland Engineering from her.
Gnome characters have +15 Engineering skill because of their passive [Engineering Specialization]. An extra 15 Engineering skill means recipes stay orange 15 points longer, so you can save a lot of gold by doing lower level recipes for 15 more points.
- 1 - 20
You will use all of these later, so make them now for free skill points.
- 20 - 25
5 x [Fel Iron Bomb] - 5 Fel Iron Casing, 10 Handful of Fel Iron Bolts, 5 Elemental Blasting Powder
You might need to make more than 5 of these if you are unlucky with the skill point gains.
- 25 - 35
34 x [Adamantite Frame] - 136 Adamantite Bar, 34 Primal Earth
You will use all of these later but you can stop making them when you reach 35, and make more later.
- 35 - 55
35 x [White Smoke Flare] - 35 Netherweave Cloth, 35 Elemental Blasting Powder
This will be green for the most part, so this is just an approximate number.
Recipe is sold by these vendors. If you are in Shattrath City, then Wind Trader Lathrai is the closest one. It's a limited supply item, so if someone bought it before you, then you have to wait it for it to respawn or go check the other NPCs who sell the recipe.
- 55 - 60
6 x [Khorium Power Core] - 6 Khorium Bar, 6 Primal Fire
It's not required to reach 60 with these, you can go to the next recipe.
You will probably need to make more than 6 of these later on, but you might get lucky and gain skill point almost every single time between 70-75, so 6 is a safe number. I personally always had to make at least 7 Field Repair Bot 110G at the 70-75 part, and 13 was the most with unlucky skill gains.
You will need these later! There isn't a single recipe between 70-75 which doesn't use [Khorium Power Core]. You will have to use some [Khorium Ore] no matter what, so it's better to make them now for a few "free" skill points.
- 60 - 70
If you have a lot of Khorium Ore, then you should make 3-4 more Khorium Power Core, and stop making Adamantite Rifle at around 67 then switch to the Repair Bot. But Khorium Ore is usually so expensive at most realms, it's still better to make Adamantite Rifle until it turns grey.
17 x [Adamantite Rifle] - 51 Fel Iron Casing, 34 Adamantite Frame, 68 Handful of Fel Iron Bolts
You will probably need to make more from these. It's usually between 17-23.
The recipe is sold by these NPCs. If you are in Shattrath City, then Viggz Shinesparked is the closest one. It's a limited supply item, so if someone bought it before you, then you have to wait for it to respawn or go check the other NPCs who sell the recipe.
- 70 - 75
6 x [Field Repair Bot 110G] - 6 Khorium Power Core, 48 Handful of Fel Iron Bolts, 48 Adamantite Bar
You will most likely have to make more than 6 because the recipe will be green for the last 3 points.
[Schematic: Field Repair Bot 110G] is dropped by Gan'arg Analyzer in Blade's Edge Mountain. There are 4 group of these mobs, but there is around 4-5 minutes between respawns after attacking the first group. The drop chance is pretty high, you will probably get it after you clear the 4 group the first time.
Note: Not sure why but wowhead lists the NPC as named Simon Unit, in-game the NPCs are called Gan'arg Analyzer.
I hope you liked this Outland Engineering leveling guide, congratulations on reaching 75!