TECH TIP: Oil Leak in Rear Main Seal Area
Symptom: An oil leak that appears to be in the rear main seal area.
Repair: Most oil leaks on this engine are found in the top of the engine, under the intake manifold. In some cases, oil may leak from the filter housings where they mate with the block, or from the oil pressure switch. Prior to removing the transmission, try using a borescope or mirror & flash light to check if oil is collecting under the intake manifold. If you cannot pinpoint the leak with dye, try connecting a smoke machine to the oil dipstick tube to check for smoke escaping from around or beneath the intake near the oil filter housing or the oil pressure switch.
- Mobil 1 advanced full-synthetic motor oil 5W-30 utilizes Mobil 1’s signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness.
- Helps protect critical engine parts for up to 10,000 miles between oil changes,* controlling oxidation to prevent oil breakdown and maintaining excellent viscosity
- Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy
- Mobil 1 is specially formulated to help remove sludge and lower engine temperatures
- Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -30 degrees F)
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API
- Advanced protection against the four main causes of engine breakdown: wear friction heat and deposits
- Delivers 40% stronger wear protection than industry standards to reduce friction and improve fuel economy
- Provides 15% better deposit defense vs. industry standards, keeping engines cleaner for smoother performance and longer-lasting protection
- Up to 2.5X better heat protection vs. industry standards to fight harmful sludge formation and thermal breakdown
- Engineered for excellent low-temperature flow, reducing metal-to-metal contact during cold starts — when most engine wear typically occurs
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API
- Better Wear Protection
- Increased Fuel Efficiency. Royal Purple Motor Oil Is Both Fluid And Lubricant
- Better Protection Of The Expensive Catalytic Emission System
- Improved Compatibility With Fuels Containing Ethanol
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API
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