This week, 12 Oil Gas & Consumable Fuels stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Exxon Mobil Corporation (XOM) gets a higher grade this week, advancing from a C last week to a B. Exxon Mobil Corporation operates petroleum and petrochemicals businesses on a worldwide basis. For more information, get Portfolio Grader’s complete analysis of XOM stock.

This is a strong week for TransMontaigne Partners L.P. (TLP). The company’s rating climbs to A from the previous week’s B. TransMontaigne Partners L.P. is a refined petroleum products terminaling and pipeline company with operations currently in Florida, Southwest Missouri and Northwest Arkansas. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of TLP stock.

Enbridge Inc. (ENB) improves from a C to a B rating this week. Enbridge Inc. is in the business of transportation and distribution of crude oil and natural gas primarily in Canada and the United States. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of ENB stock.

This week, Vermilion Energy Inc. (VET) pushes up from a C to a B rating. Vermilion Energy Inc. exploits, acquires, develops, and produces oil and natural gas in Australia, Canada, France, Ireland, and the Netherlands. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of VET stock.

This week, Natural Resource Partners L.P.’s (NRP) ratings are up from a B last week to a A. Natural Resource Partners L.P. owns and manages coal properties in Appalachia, the Illinois Basin, and the Western United States. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of NRP stock.

Plains All American Pipeline, L.P.’s (PAA) ratings are looking better this week, moving up to a B from last week’s C. Plains All American Pipeline, L.P. is involved in interstate and intrastate crude oil pipeline transportation and crude oil terminalling storage activities. The company also gets A’s in earnings surprise and earnings momentum. For more information, get Portfolio Grader’s complete analysis of PAA stock.

Sprague Resources LP (SRLP) boosts its rating from a C to a B this week. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SRLP stock.

KNOT Offshore Partners LP (KNOP) is seeing ratings go up from a B last week to a A this week. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and free cash flow. For more information, get Portfolio Grader’s complete analysis of KNOP stock.

The rating of Hoegh LNG Partners LP (HMLP) moves up this week, rising from a C to a B. The company also gets A’s in sales growth. For more information, get Portfolio Grader’s complete analysis of HMLP stock.

CONSOL Energy Inc. (CNX) shows solid improvement this week. The company’s rating rises from a B to a A. CONSOL Energy Inc. is an energy producer and energy services provider that mainly serves the electric power generation industry in the United States. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of CNX stock.

Penntex Midstream Partners LP (PTXP) earns a B this week, jumping up from last week’s grade of C. The company also gets A’s in sales growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of PTXP stock.

Harvest Natural Resources, Inc. (HNR) shows solid improvement this week. The company’s rating rises from a C to a B. Harvest Natural Resources, Inc. is an independent oil and gas exploration and development company with principal operations in Venezuela and Russia. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of HNR stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.