Do you need to change your oil after using this through a full tank of gas?

No need to change oil. This is a fuel additive that cleans fuel injectors to better mileage. Does work.

Is this ok as y to use with diesel engines?

NO....use the one for diesel (Red Line 85 Plus Diesel Fuel Additive (12 oz.) (Quantity 1)) It is also available on Amazon in several qtys.

does this also help clean the catalytic converter?

Maybe it cleans fuel system and injectors. Help clean the CAT? Sorry, I can't answer that question.

Has anyone tried using this as for an engine flush? What were the results?

No, and why use it as an engine flush? This product was formulated and meant to be used as a fuel system cleaner and it's an effective one, at least in my case. I've been using in the past 4 years on 3 different vehicles. Best results you'll really notice is using it every 15-20k. Using it more frequently is just a waste. Now, going back to engine flush question, I've used BG EPR. I used it on my wife's 2010 CRV with 150k and0

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60103 SI-1 Complete Fuel System Cleaner - 15 Ounce (4 Pack)

Product ID: 604841028

Details

Brand
Red Line
Item form
Liquid
Material features
Concentrated
Scent
Unscented
Specific uses for product
Bottle

⚡Boosts fuel stability & reduces gum buildup

⛽30% PEA concentration for max cleaning

🛠️Cleans injectors, valves & combustion chambers

B/.333

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Description

⛽ Clean fuel, smooth ride, zero regrets.

ONE TANK WONDER - Just one 15 oz bottle per tank delivers nearly 100% cleaning efficiency—feel the difference fast.
POWERHOUSE PEA FORMULA - 30% Polyether Amine concentration crushes carbon deposits like no other.
FUEL EFFICIENCY BOOSTER - Enhances gasoline stability to prevent gum and varnish, optimizing every drop of fuel.
COMPREHENSIVE SYSTEM CLEAN - Targets injectors, carburetors, valves, and combustion chambers for a full-spectrum cleanse.
PROVEN PERFORMANCE UPGRADE - Transforms engine smoothness and power, even on high-mileage, neglected vehicles.

Red Line 60103 SI-1 Complete Fuel System Cleaner is a concentrated, high-performance fuel additive featuring an industry-leading 30% Polyether Amine blend. Designed to clean and protect fuel injectors, carburetors, valves, and combustion chambers, it enhances fuel stability while preventing gum and varnish buildup. Each 15 oz bottle treats one tank with near-complete efficiency, delivering noticeable engine smoothness and power restoration—even in high-mileage or poorly maintained vehicles.

Specifications

ASIN	B00NQB6O0A
Best Sellers Rank	#32,870 in Automotive ( See Top 100 in Automotive ) #66 in Automotive Fuel System Cleaners
Brand	Red Line
Brand Name	Red Line
Contains Liquid Contents?	Yes
Customer Reviews	4.8 out of 5 stars 1,053 Reviews
Item Form	Liquid
Item Volume	425 Milliliters
Item Weight	1.76 kg
Item form	Liquid
Item volume	425 Milliliters
Manufacturer	Red Line
Material Features	Concentrated
Material features	Concentrated
Model Number	60103
Part Number	60103-4-
Scent	Unscented
Size	15 Fl Oz (Pack of 4)
Special Features	Concentrated
Specific Uses For Product	Bottle
Specific uses for product	Bottle
UPC	737534816455

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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B/.333

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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