hi,everyone,it is my first time to post here.
as you know,oil is the lifeline of our beloved car,so the concept of "change oil according to the quality",which always is our aims,becoming more and more important to our trucks and diesel engines.
Here comes to our products:THY Series Oil Quality Analyzer(below is ads,please omit it if you are not interested)

Oil Analyzer can detects and measures the dielectric constant of oil.
By measuring the complex delectric constant of oil,THY oil ananlyzer is able to determine the degree of change in the dielectric constant of the oil.
Dielectric change is directly related to the degradation and contamination level of the oil
and helps the user to optimize intervals between oil changes and to detect increased mechanical wear and
loss of the oils lubricating properties.



ThY Series Oil Quality Analyzer

1.Determining the degree of contaminate within 5 minutes;
2.Detecting metal particles beyond 60μm;
3.Determining whether the new-bought oil is qualified;
4.Determining whether the lubricant includes light oil;
5.Detecing the percentage of water in oil below 0.05% within 3 minutes;
6.With alternating current and direct current, Can be operated without power supply;
7.Detecting water in oil with or without sample oil.


The main technology index is as followed:
1.Accuracy: 0.04%(moisture)
2.Pointer scope: 0,±99.9uA
3.Repeatability: less than 3%
4.Temperature: -20 degC ~ +70 degC
5.Power: less than 5W (AC/DC)
6.Size: 285×220×115mm
7.Weight:5kg



Company：Xi'an Tianhou Electronic-Technology Co., Ltd
Address ：A 1506 Room, Shuangyu Building, West Yanta Road, Xi'an City, China
Zip code：710061
Tel ：86-29-86691978 Fax ：86-29-85215296
Website : http://english.oil8.com E-mail：trade@oil8.com
CONTACT: Davisduan

Question:
to protect your beloved vehicle,what should you do?
any valid ways

Choices:
as to diesel engine,protect it
anything else