10 Best Oil Additive For Older Engines of December 2025

• Prevents camshaft wear
• Reduces piston scuffing
• Increases engine life
• Makes newer oils work in older engines

Hy-per Lube by Rislone

• Treats 6 Quarts - The most concentrated form of ZINC (ZDDP) Additive available. 3000-3200 parts per million when blended with 6 quarts of oil.
• Provides Maximum Protection For Engine Break In.
• Protects Flat Tappet Camshafts (Hydraulic or Solid).
• Provides increased lubrication of Roller Lifter Bearings (Hydraulic or Solid).
• Provides Maximum Metal To Metal Protection.

REV X

• Prevents camshaft wear
• Reduces piston scuffing
• Increases engine life
• Makes newer oils work in older engines

Hy-per Lube by Rislone

• Affordable Solutions
• Not designed for passenger car use
• Exclusive blend of extreme pressure additives
• Excellent for flat tappet camshafts or as an additive

Lucas Oil

• GROUNDBREAKING: Made in the USA – TriboTEX is a revolutionary engine oil additive. It contains synthetic nanoparticles developed with funding from the U.S. Department of Energy, NASA, & the National Science Foundation.
• QUIETER & SMOOTHER PERFORMANCE: Reverses wear in bearings by building a diamond-like carbon coating.
• UNIVERSAL: Compatible with all types of motor oil and can be used in gas or diesel engines. Use for both old and new cars. It is an excellent engine booster.
• EFFICIENT: Our masterfully engineered engine treatment improves fuel consumption and reduces engine noise. It is time to improve your engine and take your driving experience to a new level.
• GUARANTEED QUALITY: We know you will be delighted with this ground-breaking technology. Our treatment comes with a 100% satisfaction guarantee.

TriboTEX

• The product is 32oz hd oil stabilizer
• Easy to use, increases power and miles per gallon
• Made in USA, increase oil life at least 50 percent longer

LUCAS

• PROTECT YOUR ENGINE - Older cars with flat tapped lifters-cam need the added zinc for protection
• EASY TO USE - Simply empty entire 4oz contents of the bottle to a 4 to 6 quart oil change.
• PREVENT METAL ON METAL CONTACT - ZDDPlus alters characteristics to prevent metal on metal contact
• FOR USE ON PRE 1989 AND HIGH PERFORMANCE ENGINES
• COMPATIBLE WITH SYNTHETIC AND CONVENTIONAL MOTOR OILS

ZDDPlus

• 1 Bottle Treats 6 qts. of oil - The most concentrated form of ZINC (ZDDP) Additive available. 3000-3200 parts per million when blended with 6 quarts of oil.
• Provides Maximum Protection For Engine Break In.
• Protects Flat Tappet Camshafts (Hydraulic or Solid).
• Provides increased lubrication of Roller Lifter Bearings (Hydraulic or Solid).
• Provides Maximum Metal To Metal Protection.

REV X

• PROTECT YOUR ENGINE - Older cars with flat tapped lifters-cam need the added zinc for protection
• EASY TO USE - Simply empty entire 4oz contents of the bottle to a 4 to 6 quart oil change.
• PREVENT METAL ON METAL CONTACT - ZDDPlus alters characteristics to prevent metal on metal contact
• FOR USE ON PRE 1989 AND HIGH PERFORMANCE ENGINES
• COMPATIBLE WITH SYNTHETIC AND CONVENTIONAL MOTOR OILS

ZDDPlus

• Quicker more efficient ring seal
• Higher levels of zinc and phosphorus maximum protection
• A must use for flat tappet camshaft break-in
• Less blow-by equates more power and better ring seal
• Requires no moly supplement and no additional additives

Lucas Oil