Would this be great for a 335i N54 with heavy performance mods?

Absolutely, I run it in my Shelby GT350

Can i use it on a 2005 bmw 545i?

The 2005 545i uses 5w30 or 0w40 when in temperatures over 50 degrees F.

Is this good for an old/worn opel zafira b 1.9 cdti, or is it a bit too thick for the system?

I’m sorry I don’t know about your particular car however it went into my 2020 Shelby gt 350 easily, as it is the required viscosity. The oil was not thick like the old 20/50 weight oil it was actually easy to pour. The oil pressure typically runs over 100 lbs in the Shelby if that helps.

Red Line 11605 Motor Oil by Red Line Oil

Red Line 11605 Motor Oil by Red Line Oil

Product ID: 570657517

Details

Brand
Red Line
Liquid volume
1 Gallons
Package information
Bottle
Vehicle service type
Motorcycle
Viscosity
5W-50

⏳Extended drain intervals with high detergency

🔥High-temp stability & oxidation resistance

⚙️Full-synthetic ester/PAO formula

Description

🔥 Drive with confidence, powered by precision.

EXTENDED OIL LIFE - High detergency allows longer drain intervals, saving time and money without compromising engine health.
PROVEN LEGACY OF EXCELLENCE - Since 1979, Red Line delivers uncompromising protection and performance that discerning drivers demand.
UNMATCHED THERMAL STABILITY - High temperature stability and oxidation resistance keep your engine cooler and cleaner under pressure.
ENGINEERED FOR PEAK PERFORMANCE - Full-synthetic ester/PAO formula ensures superior lubrication for passenger cars, light trucks, and performance vehicles.
OPTIMIZED FOR ICONIC POWERHOUSES - Trusted by Shelby GT500, Ford GT, Focus RS, and Range Rover engines for maximum reliability and power.

Red Line 11605 Motor Oil is a premium full-synthetic 5W-50 ester/PAO blend designed for high-performance engines including Shelby GT500 and Ford GT. It offers superior high-temperature stability, oxidation resistance, and high detergency for extended oil change intervals, ensuring cleaner engines and improved fuel economy. Trusted since 1979, it’s engineered to protect and enhance engine performance under the most demanding conditions.

Specifications

ASIN	B004BORLQM
Brand Name	Red Line
Compatible with Vehicle Type	Motorcycle
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (59)
Global Trade Identification Number	00083522116053
Item Weight	3 Kilograms
Liquid Volume	1 Gallons
Manufacturer	Red Line
Manufacturer Part Number	11605
UPC	083522116053 083522116251
Viscosity	5W-50

Reviews

M**A

Excellent. Highly recommend

3.11.2025

V**D

Excellent product, strongest film strength in it class!

15.02.2026

V**L

Switched from Liqui Moli which was super noisy at startup. No more noise on cold start ups and runs butter smooth. Makes the butt dyno feels good. Overall a solid oil and would highly recommend. E92 M3

15.07.2024

S**N

I will admit I was a user of Royal Purple for years until I tried Redline. Redline made my 02 chevy avalanche run smoother and quieter and might have even picked a couple of more miles per gallon since I changed to this oil. It's more expensive but I think it's worth it in the long run. I used to change my oil at every 3-4 k with royal purple. I am going to try every 5k with redline and see how it does. Awesome performance also out of my 5.3 vortec. Loving this oil so far!

16.10.2024

C**D

I've been using this in my track car for years (over 100 hours of road courses, and at least that many autocrosses). Never had a problem, maintains viscosity with very little blow by in the catch cans. Would seriously recommend.

30.10.2020

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