We heard that this product only needs to be used twice a year, does anyone know if it says this on the bottle?

So?? Which came first?! My bottle says 6,000 miles… this bottle is about 10 months old. I’d really like to know if the manufacturer recommends 6k or 6 months! Thanks

Would this product be suitable for a 1.6 Diesel engine in our family car?

I use it it a 1.9 TDI and 2 7.3 diesels.

Has anyone used this with a TDI with DEF / Urea?

It is specifically designed for restoring the performance of diesel engines so yea it will be fine in your TDI just make sure you follow instructions don't mix it too strong or your car will run like a raped ape for a minute

I want to use this in a diesel parking heater to try and remove some of the carbon buildup inside the burn chamber. Do you think this would do that?

It is very unlikely that using Diesel Extreme will remove carbon that is already built up in your heater. It is best used as a preventative to combat the amount of soot/carbon build up. Another note is that unfortunately, Diesel Extreme is very odorous and using it in an open heating element may cause some unpleasant odors.

ASIN	B086DWKK29
Best Sellers Rank	#797 in Automotive ( See Top 100 in Automotive ) #7 in Fuel System Cleaners #8 in Diesel Additives
Brand	Hot Shot's Secret
Customer Reviews	4.7 4.7 out of 5 stars (5,569)
Date First Available	August 30, 2017
Is Discontinued By Manufacturer	No
Item Weight	7.74 pounds
Item model number	P040401G
Manufacturer	Lubrication Specialties, Inc.
Manufacturer Part Number	P040401G
Model	P040401G
Product Dimensions	6.5 x 4.75 x 10 inches
Special Features	Concentrated Fuel Injector Cleaner

Hot Shot's Secret Diesel Extreme 1ガロン 濃縮燃料システムクリーナー ディーゼル燃料添加剤 インジェクタークリーナー - MPGを向上させ、エンジンパフォーマンスを回復させます。

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Hot Shot's Secret Diesel Extreme 1ガロン濃縮燃料システムクリーナーディーゼル燃料添加剤インジェクタークリーナー - MPGを向上させ、エンジンパフォーマンスを回復させます。