Avalon Oil & Gas (OTCMKTS:GRVE – Get Free Report) and Valero Energy (NYSE:VLO – Get Free Report) are both energy companies, but which is the better business? Get Avalon Oil & Gas alerts:Gross Revenue Price/Sales Ratio Net Income Earnings Per Share Price/Earnings Ratio Avalon Oil & Gas N/A N/A -$140,000.00 ($0.01) -0.41 Valero Energy $139.40 billion 0.63 $2.35 billion $24.10 12.36Volatility and RiskValero Energy has higher revenue and earnings than Avalon Oil & Gas. Avalon Oil & Gas is trading at a lower price-to-earnings ratio than Valero Energy, indicating that it is currently the more affordable of the two stocks. Given Valero Energy’s stronger consensus rating and higher possible upside, analysts clearly believe Valero Energy is more favorable than Avalon Oil & Gas. Net Margins Return on Equity Return on Assets Avalon Oil & Gas N/A N/A -2,484.25% Valero Energy 5.17% 26.74% 11.92%Institutional & Insider Ownership78.7% of Valero Energy shares are held by institutional investors.