Wondering which engine flush is the best? Below we compare popular oil flushes available in Poland and worldwide against TEC 2000 Engine Flush. The table is updated regularly.
| Brand | Product | Base / strength | Lubricant buffer (SDS) | Kerosene | Key feature | Verdict |
|---|---|---|---|---|---|---|
| LIQUI MOLY | Pro-Line Engine Flush | Mixed · Strong | ZDDP 1-2.5%, no EP additive | No - hydrocarbons C10-C13, under 2% aromatics (70-90%) + paraffinic fractions | Dearomatised C10-C13 base with ZDDP at 1-2.5% and calcium sulfonate at 1-2.5% (Section 3). The regular Engine Flush 2640 has the same declared composition as Pro-Line | Effective premium solvent; the sheet lists ZDDP protecting surfaces during the flush |
| Wynn's | Motor Cleaner - Oil System Cleaner 325 ml | Mixed · Medium | None in the SDS | Heavy petroleum distillates (≥50%) + C10 aromatic hydrocarbons 10-15% | Kerosene base with C10 aromatics and amine; notably higher aromatic content than premium brands | Strong dissolving action from aromatics, but kerosene base with diethanolamine raises questions about compatibility with modern seals |
| Bardahl | Engine Flush / Pre-Drain Cleaner 300 ml | Kerosene/heavy · Strong | None in the SDS | Hydrocarbons C10-C13 (80-95%) + kerosene 1-10% | C10-C13 solvent dominant; kerosene addition boosts dissolving power, no lubricant additive | Solid solvent formula with kerosene addition; absence of lubricant means no seal protection during the flush cycle |
| MANNOL | Motor Flush 9900 | Mixed · Medium | Calcium sulfonate (detergent), no ZDDP | Mineral oil base; only disclosed hazardous ingredient is ethoxylated isotridecanol (<0.5%) | Very sparse SDS - mineral oil base with calcium sulfonate, limited composition data | Budget option with limited SDS data; difficult to assess full composition without complete safety sheet |
| Moje Auto | MA Professional Engine Flush 400 ml | Heavy synthetic (GTL) · Gentle | None in the SDS | No - synthetic GTL Fischer-Tropsch base (heavy distillates C18-C50) 75-85% | The only declared component is a GTL synthetic (Fischer-Tropsch, CAS 848301-69-9) at 75-85%; the sheet lists no lubricant additive or detergent and does not declare the remainder | Budget flush on a heavy C18-C50 synthetic base, gentle on seals (the sheet lists H304 only). A heavy fraction dissolves less than light solvents, and the sheet declares no lubricant additive |
| TEC 2000 ⭐ BEST PICK | Engine Flush | Aromatic · Very strong | ZDDP + sulphurised olefin (EP) | No | Advanced hydrocarbon solvent blend (aromatic base) + additive package with ZDDP (anti-wear, CAS 6990-43-8, listed in SDS v3.1); chlorine-free, no kerosene | Top pick - effective and seal-safe |
| Motul | Engine Clean Auto | Aromatic · Medium | None in the SDS | Hydrocarbons C10-C13, <2% aromatics (50-100%) + light paraffinic distillate (10-25%) | Pure C10-C13 solvent base; no ZDDP or other lubricant additives | Proven solvent from a premium brand, but purely solvent-based - TEC 2000 additionally offers a lubricant component protecting seals |
| K2 | Motor Flush T371 250 ml | Aromatic · Very strong | None in the SDS | Reaction mass of ethylbenzene and xylenes (<70%); aromatic hydrocarbons | Aromatic base (ethylbenzene + xylenes) - powerful solvent, classified as flammable and harmful by inhalation | High-activity aromatic formula effectively removes deposits, but xylenes carry higher OHS risk than the light C10-C13 alkanes used by premium competitors |
| Mathy | MATHY-C Motor Interior Cleaner (Engine Flush) 400 ml | Mixed · Medium | ZDDP 1-3%, no EP additive | Hydrocarbons C12-C15, <2% aromatics (50-100%) + sodium petroleum sulfonate (5-10%) | Unique 3-component formula: C12-C15 solvent + sulfonate detergent + ZDDP (1-3%) | One of the few competitors with a ZDDP component; similar approach to TEC 2000 (solvent + lubricant balance), though with a different type of lubricant additive |
| STP | Engine Flush 30-011 450 ml | Mixed · Strong | ZDDP 1-3%, no EP additive | Hydrocarbons C11-C14, <2% aromatics (50-100%) + heavy paraffinic distillate (10-25%) | C11-C14 solvent with paraffinic base oil and ZDDP (1-3%) - three component classes | Competent formula with ZDDP providing anti-wear protection; similar philosophy to TEC 2000, but solvent base dominates |
| Castrol | Engine Shampoo (Castrol Flush) 300 ml | Light aliphatic · Gentle | Molybdenum dithiocarbamate (friction modifier) | Hydrotreated heavy paraffinic distillate (≥75-90%); light solvents as minor fractions (≤3%) | Exceptionally oil-heavy base (≥75% heavy distillate) + trace molybdenum dithiocarbamate friction modifier | Gentle paraffinic oil-based formula - minimal seal risk, but limited dissolving power; TEC 2000 achieves solvent+lubricant balance without such a dominant oil base |
| Comma | Engine Flush (Petrol/Diesel) 400 ml | Mixed · Medium | ZDDP under 1%, no EP additive | Hydrotreated heavy paraffinic distillate (15-25%) as main disclosed ingredient; full composition not revealed in SDS | Limited SDS data; declared ZDDP (<1%) and alkyl phenol (<1%) as additives | Insufficient SDS data makes full assessment difficult; ZDDP presence is positive, but low concentration and lack of composition transparency |
| Forté | New Generation Motor Flush 400 ml | Aromatic · Strong | None in the SDS | Hydrocarbons C10-C13 with aromatics 2-25% (≥50%) + C10 aromatics (10-25%) + glycol ether DPM (10-25%) | 3-solvent formula with notable C10 aromatic and DPM glycol ether content; no lubricant additive | Aggressive solvent formula (aromatics + glycol) effectively breaks down varnish and sludge; no lubricant component - seals unprotected during flush |
Comparison data is being expanded and verified from manufacturer sources.
Why TEC 2000 Engine Flush?
- No kerosene - unlike many flushes, TEC 2000 contains no kerosene at all.
- 2 solvents + 2 lubricants on a non-chlorinated hydrocarbon base - dissolves carbon build-up while protecting the engine.
- Seal-safe and simple to use (about 10 minutes before an oil change).
How to read this engine flush comparison
The table sets out, among other things, the solvent base, whether the product contains kerosene or heavy distillates, and the lubricating component, meaning the additive that protects sliding surfaces. The source is the safety data sheets, which give composition (Section 3) and hazard classification. A sheet does not measure cleaning performance, so the table compares compositions. A sheet lists only substances classified above a threshold, so it does not show the full recipe. We infer solvent strength from the type of base: aromatics dissolve more strongly than dearomatised paraffinic fractions.
The engine flush ranking puts the flushes in order by composition. The original documents are in the safety data sheet library. The effect of a flush on seals is covered in Will an Engine Flush Cause Leaks? Myths vs Facts.
Brand pairs have their own comparisons, for example TEC 2000 vs Liqui Moly, Würth vs Liqui Moly and Motul vs Mannol.