Tip 1: After sending out your drowser/scanner/mole at the beginning of a level, place a horse cart immediately. You don't want to end up with oil flowing, no cash and no cart to sell the oil, forcing you to take a loan.

Tip 2: The horse cart upgrades correlate with the pipe width upgrades. After upgrading to a 2nd level pipe, upgrade your horses too so they can keep up. The same goes for 3rd level pipes.

Tip 3: There is a 1000$ bonus for early withdrawal so if you've finished a level early, click on the date and withdraw land lease.

Tip 4: If your dowsers are fully upgraded and they walk off the map without finding oil; then, there are no more untapped oil pockets. If the dowsers aren't fully upgraded, the oil pockets might be there but deeper than the dowsers can detect.

Tip 5: There are four possible bonuses each level, each worth 1000$: all oil depleted, all oil sold, all gas depleted and early withdrawal.

Tip 6: Don't ever take out loans. The only reason to take one out is if you accidentally spent all your money before buying land or forgetting about the 2000$ startup cost. To avoid such a situation, buy land before anything else.

Tip 7: At the beginning of stages 3 & 4, before bidding on land, give a diamond to Anthony in the Saloon so that he points out land with a lot of oil.

Tip 8: Dowsers detect oil below them, but the oil pocket may be 1 cm to the left or right, not necessarily straight down.