Lucas Oil Stop-Liquid-Greatest...Engine Oil Showdown! We recently added Lucas Oil Products LUC10278 Engine Oil Stop Leak to our lineup, eager to see how it stacks up. After applying the 1-quart bottle to a stubbornly漏 oiling engine, we noticed a difference within hours. The thick, gelled oil tackled leaks around seals and gaskets, effectively sealing gaps without needing excessive re-t Tightening or replacement. The packaging was straightforward—便 one-pack, the quart size was just the right amount for our test vehicle. While we hesitate to call it a permanent fix, it provided a much-needed Band-Aid for an aging engine, saving us time and money. The consistency thickened noticeably, leaving us impressed by its ability to cling to surfaces. For temporary relief, it’s a solid contender in our engine oil showdown.