The grades of 6 Oil Gas & Consumable Fuels stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Phillips 66 (PSX) improves from a B to a A rating this week. Phillips 66 operates as an independent downstream energy company. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, and return on equity. For more information, get Portfolio Grader’s complete analysis of PSX stock.

Valero Energy Partners LP (VLP) shows solid improvement this week. The company’s rating rises from a B to a A. The company also gets A’s in sales growth, operating margin growth, earnings growth, and return on equity. For more information, get Portfolio Grader’s complete analysis of VLP stock.

This is a strong week for Western Refining, Inc. (WNR). The company’s rating climbs to B from the previous week’s C. Western Refining, Inc. is an independent crude oil refiner and marketer of refined products and also operates service stations and convenience stores. The company also gets A’s in operating margin growth and return on equity. For more information, get Portfolio Grader’s complete analysis of WNR stock.

Newfield Exploration Company’s (NFX) ratings are looking better this week, moving up to a B from last week’s C. Newfield Exploration Company is an independent crude oil and natural gas exploration and production company. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of NFX stock.

Par Pacific Holdings Inc (PARR) gets a higher grade this week, advancing from a B last week to a A. The company also gets A’s in earnings revisions, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PARR stock.

PBF Logistics LP (PBFX) 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 PBFX 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.